Is this still a thing in SoD, and if so, will it be lifted like during some of the other launches?
Restrictions apply only to the number of dungeons per hour(5).
This was from 3 weeks ago: https://us.battle.net/support/en/article/10994
“In WoW Classic you can enter up to five individual instanced zones per hour, and a maximum of 30 instanced zones per day. The limit is per character. 40-player raid instances are not affected by the 30-per-day limit on entering dungeons.”
Are you certain?
A friend sent me this screenshot, but after your post I’m not sure anymore.