As an end user, I don't care about proprietary garbage, I want my mouse to work :). I understand the aversion to proprietary stuff etc. But non techie end users don't give a flying fuck.
Also, everyone has had an MS account since the msn messenger and Hotmail heydays. That is an absolute non issue for 99% of the people tbh.
Ever heard of a job? Some people need to work with a specific software suite as part of their job, regardless of their personal convictions :)
I have to use office and chrome on windows at work, I don't get any choice in the matter.