[nicehill]

Agreed.

Gmail, GDocs, and GAnalytics have been the hardest replace. I can't find a reasonable free alt. to those.

[BrandoElFollito]

You can give HedgeDoc (https://hedgedoc.org/) a try as a replacement for Google Docs.

It is the one that works best for concurrent editing IMO (but it is markdown which can be a problem for some)