Telemetry reactivates itself every time Windows updates. Also Edge forgets your ignore preference, and repins itself to the taskbar.
Ads can appear on the start menu, and lock screen.
Office asks to be activated every time you open it if you don't link an email. (Though it is activated).
You no longer have search without Cortana.
These are not small annoyances that happen sometimes. They happen frequently. Microsoft is dictating how you must use a computer.
It results in a lot of calls from less tech savvy friends wanting me to 'fix' their computers.
This seems to me, to be an unsustainable bad business practice. It could work if there was no competition in the market, but Apple certainly competes, and for many, Android is also an option.
That's ignoring the crapshow that tried to force everyone to adopt W10.