It varies. As for those whose speakers throw a wide, deep soundstage, I’ve heard such speakers. They are wonderful but they also lack some of the precision in other speakers. From my experience, which is limited compared to many, a narrower sweet spot is compensated by more precise imaging in the soundstage. Some don’t prefer that. I kinda like it.
Oh, and that comment about needing a good (or well treated) room to do this? Absolutely. 1000% key.