Itās definitely not fixed at all the shaders didnāt fix it.
Itās not windows 11 as I get it on windows 10 just the same. Seem to be a compilation of client memory leaks and latest graphics drivers causing the issue.
and the other ones being itās a huge waste of cash and dev time to rewrite an entirely new game with new engine from the ground up when it wont even bring that many people or money in compared to the current one 
I7 3770K, 16gb ddr3 1666mhz, rx570 8bg, no stuttering here, only at the release. Used some command and after that I never experienced it. Maybe they hotfixed it or that /command worked.
Wins 11 here and no issuesā¦
Thatās your issue, you canāt have litter in your computer.
what have you tried among all known fixes and it didnt help?
While in real life you absolutely should turn shadow effects down, never reduce water quality.
Yes tried everything including installing more memory to cope with the leak this helped the most.
I have yet to try disabling the MPO but will try tomorrow but yes everything else and itās a lot of things.
what is helped me is disabling cacheless shader mode in config.wtf, youāve also tried that right? are you playing on dx12?
Yes tried that and didnāt work, I am on dx12 but also tried 11 also tried 11 legacy
The cashless shader was also changed by blizz on a patch so this is in the client already.
thatās strange for me bcz of 1 reason, i dont understand how that many people had stutter issue but the allround fix helped like only 70% of people, and why others dont have any memory leaks or whatever you are experience out there (me as an example, all my drivers are up to date, my rig is rtx 3060, i5 10400f and 16gb 3200 16cl ram, windows 10 22h2 19045.2311, and i have 0 stutter issues).
there is a ghost in the machine 
The problem is almost certainly that the OP is running out of date / too many addons.
I had ludicrously high cpu usage a few weeks ago (I made a post about it somewhere) cleaning my addons list out has resolved the issue.
I never saw stuttering, but strikes me that the same might be happening to you.
Whatās more weird is my wife has exactly the same machine, same add-ons, same patching and no issues.
Something very weird going on.
Nothing to to with add-ons, even with none loaded itās the same.
i donāt get this my 12900ks with 64 gb of ram and a 3090 First Generation donāt have this problems 
but as i jokely told voidsteel its the price you pay for being an early adopter
does the 4000 series even have a dedicated psu yet if not enjoy your burning pc i guess
bios settings/version? windows stuff? it could be anything at this point related to hardware/software (iād bet it is software thing)
Is there anything outside of wow that could be hurting your in game performance (such as other programs) since if your wife has the same build, and same game client, something else might causing issues.