I'm surprised the author didn't mention my personal biggest frustration I've had since I made the mistake of upgrading.
Everything seems to be lazily done now - by that I mean, a modal pops-up and then it resizes to fit the content. Never seen this before.
Or, you open settings (settings!) and it's not ready to use until a full second later because things need to pop in and shift.
And it's animated- with animation time, so you just have to wait for the transitions to finish.
And "reduce motion" removes visual feedback of moving things (e.g. closing apps) so I find it entirely unusable.
And as others have noted the performance is completely unacceptable. I have a 16 pro and things are slow... And forget "low battery mode" - it's now awful.
I'm not doing anything weird and keep like all apps closed and things off when I don't use them and battery life is significantly worse. (Noticed the same on M4 + Tahoe, upgraded at the same time)
Very disappointed and I very much regret upgrading.
File a bug in Feedback Assistant. There shouldn't be any performance issues.
They don’t have automated tests for this? Very weird