Most of the lazzy developers stick with the (too) open Google environment. However, most business use O365. So, it should be great to have calendar integration with O365 as well.
Lazzy is certainly not true at all.
Anyway, if you really want it, there are ifttt and zapier recipes to sync a google calendar to a o365 calendar for example https://ifttt.com/applets/YDz9nHcX-google-calendar-event-to-office-365-calendar-event
I’d second the desire for office 365 intergration both on calendar and backup feature.
I’ve just moved away from Google exclusively to Office 365 (i know many others who are doing the same).