Was that on both consoles or just the Wii U or Switch?

I played on Switch and I feel like I don't remember that. But honestly I may have just not cared... I burned through that game. I could not put it down.

Regardless, if it was limited to a few areas and not basically as soon as you start the game I feel like it's much more forgivable. Especially for just how damn beautiful that game was.

I remember the Korok Forest in BOTW running at sub 20 fps back when I played it on Switch in handheld mode (I'm guessing at the fps). It was the only area I remember having performance issues, but there might have been other places.

Even emulated where my pc can run the game at upwards of 100fps at some points still drops to like 30 at Hyrule Castle

It's still bad in a few areas. I have one of the original Switches--the one that can be jailbroken.

I believe it was affecting both but it was much more noticeable on the wii u. it was mostly anywhere that had the fog effects going on that i saw it but even then it wasn't taking the framerate to an unplayable level, just to a level that made it obvious that there was an issue.