As someone that works at an IT company, not a software company, Almost every customer that started with google is switching to o365. Nearly 99% of our clients are on o365 or are switching from on-prem exchange to o365. I can see maybe the bubble of silicon valley might be more oriented toward google, but the vast majority of businesses continue to migrate to o365.
M365 the far superior solution to many business problems. As a long-time paying gmail customer I'm also moving away. It looks like Google didn't improve UI in their admin menus for at least a decade.
Some people would pay extra to not have the UI change every couple of years. As someone who no longer regularly uses Windows it drives me nuts to try to find anything in their web apps or settings interfaces.
