Recently got an HP ProBook for a relative to replace his old 2011 ThinkPad with Kubuntu 24.04 and I was shocked how laggy and unusable Windows 11 was. Every menu has tons of latency, programs take forever to start, even something simple like Rufus. File Explorer is a laggy mess, the whole OS feels like you are walking through mud. After a reboot there was a fullscreen message about "finish setting up the device" (??? it's already set up) with the only options being Confirm and "Remind me in 3 days". Thankfully my relative was comfortable with Kubuntu and all his files were there (and frankly we were too lazy to set everything up from scratch again) so I just cloned his old drive and Kubuntu runs like a dream! I'm not someone who would advocate for Linux because it still has very rough edges (even more so than 10 years ago somehow) and has a higher learning curve but Windows 11 is unbelievable bad. I switched to macOS roughly around Windows 11's release so my only other experience was at work (where I constantly complain about the TWO context menus!!!).

The last performant Windows version was Windows 8, despite its UX flaws. It actually made old computers faster and it started going downhill with the very first Windows 10 Technical Preview. I doubt that MS will reach that level of performance and stability again.