If I recall correctly they want to get people on their 365. Not a good plan unless you trust Microsoft completely, of-course these kind of moves don't help their argument.
There is a noticable delay when I click to focus on the search bar, and often I have to retype because I click and go to start typing in my search term and lose the first few characters.
Almost always, when I search for an email in the Android app, it just hangs and even if I leave it to sit for minutes...
It's not about trust in motivation at this point. It's about trust in competency.
We'd have migrated to Google, except the system administrator had booked a holiday for two of the weeks.