> I use shitton of MS products, but I cannot switch from Google's gmail, docs and drive to anything.

Here's my libre stack:

  - Thunderbird for e-mail (whichever provider you like, i also self-host a mail server for automation etc.)
  - LibreOffice, which i use as a local piece of software, because web office apps rub me the wrong way
  - Nextcloud, which i also self-host and which has both desktop software and mobile apps

Of course, that's not something that everyone might want to use for themselves, but personally it has worked out pretty nicely for me, allows me to keep my data private (for the most part) and is a rather cost effective way of doing so!