Office 365 is hard for most organizations to switch from, since the overall package is a set of tools that are generally better than the Gsuite competition.
Some MSPs I work with make good money just converting businesses from Gsuite to Office 365. I don't use either platform personally or at my work, but I understand why Microsoft is eating the SaaS email & baseline office tools market.
Gmail and Calendar are great. Drive is also sub-par in experience when compared to Dropbox (probably Box as well though I've not used it)
Oddly Sheets is the only one I like. It is good enough for most use cases and simpler and easier to use than Excel.
I've never even considered using Docs or Slides.