I have 3 different security scanners forced by security and it is much slower than my personal Linux Lenovo. Even just the basics with UI responsiveness that in my experience Macs have always been pretty good at, to the detriment of applications.

My experience of the ARM Macs has been through work, I personally owned Intel Macs and they were generally crap but felt faster than this.

Not only we don't share PC anymore, but PCs started to share us. We possess several PCs per single person, and we needed Dropbox to manage files on multiple PCs. Dropbox can be perceived as second turning point in time, and it was more than decade ago. Now it's one goal = one device era. We buy device and we sincerely don't intend to install anything else on it. We don't risk our data using NTFS shrinking tools to make spare room for another filesystem. We don't dual boot losing access to programs in another partition. There are ways to mount NTFS in other OS and vice versa, so documents may stay accessible, but programs are not runnable. This is now ridiculous. We just buy two, three, whatever devices and have all programs runnable simultaneously.

If we need something from another OS, we'll precisely buy compatible hardware without locked bootloaders or any other possible obstacle which are numerous. To name a few.

For DOS retrogaming we need DOS ISA DMA sound, and we pick PC with ISA slot and making sure motherboard chipset has DMA on ISA, which is not true on latest chipsets. For another DOS retrogaming option we consider VDMSound, but last OS to support it was Windows XP, and we choose hardware that is Windows XP compatible. Most likely UEFI-only boot will be a problem for Windows XP. For Mavericks Forever we are not going to look for random incompatible Mac. That is going to be either real compatible Mac selected from known list, or else compatible Hackintosh. On Hackintosh there was a big problem with software upgrade, but there will be no upgrades for Mavericks Forever. Tim Cook drives company away in direction we don't appreciate, and Mavericks Forever stays forever the same version.

Nowadays people are not using OS anyway. Nowadays people are using browser. I wish I could drag and drop documents in Mavericks Forever like I did in 2007. But document is now likely to be draw io, rectangular embedding for browser that cannot support drag and drop outside its rectange. And so messenger is also rectangular embedding for browser, not respecting Mac OS X multi-window paradigm, not supporting previously established gestures. In 2007 I thought that Qt programs on Mac were ugly. Those happy days I have not seen Electron yet.

People I know often report that they got rid from "dust collector", the PC. They are now all-Android. As time goes by, it is harder and harder to find someone with PC. So whatever Microsoft preinstalls or bootlocks on PCs, it goes to people less and less.