The other apps don’t harvest my data, for one

These companies hate PCs because of the flexibility and choice. Thus Chromebooks, et al. Lock that stuff down and channel any installs through a single point of control, and do it by convincing anyone who needs a secure application that they don’t need to work too hard at it, the closed system will protect them.

Ive got a R720 running a decent load at the moment pulling 90W, which is about what my laptop uses. So you can totally do rack mount machines that aren’t howling winter heaters.