Unreal Engine is notoriously bad for MMOs, all the MMOs who used UE in the past have had issues.
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Netcode is what Garrosh used to call Sylvanas.
This is one of the main reasons why New World has faced so many issues. They use a modded Cryengine. Cryengine can handle tab-target MMOs, but when it comes to full action combat, it struggles with 8 player multiplayer, let alone an MMO. Engines matter a lot.
Like what issues?
WoW is super toaster friendly: you can play it on 10 year old hardware that was mid-range back then. UE4, however, will not run on stuff that old because itâs designed to make use of current PC/PS5/XSX hardware. Even if one would spend a ton of engineering effort to strip out all the high-end features of UE4, it would still be too bloated for really old hardware.
The game Assetto Corsa is a good case study for why UE4 isnât a solution for everything. AC is a racing game, so like WoW, itâs a type of game that has very different technical requirements from an Unreal-like first-person shooter. The Assetto Corsa developers wanted a new engine for their second game, Assetto Corsa: Competizone, and decided to use UE4. They managed to make the game look great with it (nice shaders, lighting, and weather effects), but it only runs well with high-end PC hardware, and even with that, it doesnât easily run at 100+ FPS (hardcore racing sim fans would prefer 200 FPS), even when the graphics settings are dialed down. They released AC:C on PS4 and XB1 about 2 years ago and it was a total 
-show because they could only make it run at like 20-25 FPS, which is basically unplayable for a racing sim, because they couldnât strip down UE4 enough that the old consoles.
Thatâs a networking problem and not a graphics problem, though. UE doesnât have any MMO networking features, so it wouldnât solve that problem.
Bruh, I canât even play WoW on my computer I had in MoP.
The main thing they changed was in 8.1.5, how the game loads assets. Now playing from an SSD is an absolute must. Beyond that, all you need to play WoW on max settings is a mid-range PC from 5-6 years ago.
Nah, Iâve played WoW from my 7200 rpm HDD, it just took a bit longer with loading screens and some things didnât render as fast.
Nah.
Iâve got a i9-9900k, rtx 2080 super and 32 gb ram and a SSD. I canât even run the game at higher than like 100 fps in most places while my monitor is 144 hz. That thing spawning in korthia absolutely destroyed my FPS, I had like 5 fps when it was spawning.
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The usual bad framerates, you should just google it if youâre interested, itâs not really my field of expertise, Iâm just a guy who watches youtube videos about MMOs.
Never had any problems with it in TERA. My FPS was more stable there than in WoW.
Check out how TERA was on release then, obviously an old game will run smoothly nowadays.
Iâve got a i7 7700K and a 2070 RTX and can run WoW at a fairly steady 60-100 FPS with ray-tracing enabled (not the max settings though) at 2560*1080. It only drops to 60 in cities with tons of players are around. If you want 144 FPS everywhere, youâll need to turn some of the expensive graphics settings down a bit (ray tracing, shadow quality, view distance).
That Korthia issue with the 5 FPS: yeah, I noticed that too, but that was a bug that Blizzard fixed about a week after 9.1 launched.
I played TERA on release. I didnât have anywhere close to the same issues with FPS in that game as I do in WoW. Nothing in TERA killed my FPS like that thing in Korthia that shot up into the sky with blue stuff.
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I canât even achieve 50 fps steady unless Iâm in an area devoid of people around me with raytracing enabled.
With raytracing enabled in oribos.
Without.
Ok cool then what do you want me to say? I donât invent known issues with UE in MMOs, Iâm not interested in continuing this conversation if all youâre looking for is being right.
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Slagging of UE for having problems when the issues with WoWâs engine are far worse is just laughable.
I never compared one to the other, you did that.
I know it might look better at first but it wonât feel like the same game anymore once they do.
This might be an odd comparison but this happened in the Kingdom Hearts series. Every game had a very specific cartoonish graphic style until Kingdom Hearts 3 came out which ran on unreal engine 4.
Now the game was good but it didnât feel like a Kingdom Hearts game. It looked so different that it actually changed the way it felt for many fans of the series. Some liked it but many did not.
Therefore imo the risk/reward ratio is not worth it.
Yes it is odd comparison considering UE4 is flexible enough to allow all kinds of art styles so it was developers choice to modernize the art-style in KH3. Also donât forget WoW doesnât look like it was back in 2004 either.
Many did not like it according to what data? If anything, the game was praised for itâs visuals but criticised for gameplay and story issues
There is no risk/reward, itâs all just theoretical°as moving WoW to UE4 would take decades and it would have more bugs than 100 Cyberpunks combined
You can get 60fps on high/ultra settings on a GTX1050ti. Donât nah me.
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Swapping game engine means making the game from scratch you know that right ? No one really has that amount of manpower making 9 xpac worth of stuff from scratch and adding another xpac on top of it.
Lets think like itâs possible for a moment ( which is not) , unreal assets probably made you want it and i personally donât like how the games look in unreal 4 at least for wow.
I would also like to make them a new engine for those lag issues caused by warcraft 3 engine but it doesnât seem realistic