Games: nope. Same as someone above, I've got Cyberpunk on Linux
Office/Adobe... may be a fair point for some
Nvidia card: nope, works fine
HDR: did not even bother to learn what is. Can be a fair point
Fractional scaling - genuine question: who the hell ever needs this? I have gone from 1K resolution (standard laptop) to 2K to 2.5K to 34K with curved monitor and never ever ever did I think "hey, this big screen? I want everything bigger/smaller on it". What do people use fractional scaling for?
I feel like I will never go for more than present 4k with around 80cm width (but it is curved, so screen surface is enough), because if I try to stuff more windows visible at the same time, it becomes more info than I can process. So, unless I start building something like personal dashboard, this is my limit: finally see enough, do not get overwhelmed
Your post smells of someone, who only uses their computer for fairly limited tasks.
Office/Adobe
There's so much software around serious work, creativity, and productivity, that doesn't exist for linux or is meh. CAD, audio, video, music production.
The main reasons I use macOS are GarageBand and apps for DJing. Anything audio still breaks far too often on linux or is otherwise a pain.