At this point, it's a marginal cost vs. benefit game: the cost differences between the two services are virtually 0 (and if not, getting closer each month), and the benefits show that we have more to _lose_ than gain from the switch.
GSuite is $10/user and offers similar products, but you have to pretty much support yourself.
The $20 extra a month I pay for my small team is negligible.
The company I work for pays even less per person than I do, with the enterprise licensing and the MS cash that gets thrown at us for integrating with them. Our first year of 365 is basically free, same with our switch from our data center to the cloud.
We are looking to save millions a month by making this move.
Since use mostly linux - desktop version of Office365 is useless for me.
To sum it up: one third Office price - no functionality lose for me and some functions not available in Office at all.