[ysleepy]

I work on a 2015 13" and its completely fine. Only the mission control animations are sometimes 15fps on my 4k screen. Web browsing and dev work is good as ever.

Maybe check if the cooling is clogged or the cpu is force throttling because some temp sensor is not working. Run apple diagnostic for that.

MacOS has a bunch of bugs (for me) and they have terrible QA as it seems, but I don't see planned obsolescence here.