I did a look into this. softmaker is best when it comes to compatibility of displaying files. Wps office is ok, but some text would be on top of others. I did find that there is a free version of softmaker, which should be ok.
I use lucky backup to mirror to external drive. And I also use Duplicacy to back up 2 other separate drives at the same time. Have a read on the data hoarder wiki on backups.
Networking effect
Mastodon required people to join a server which made out to people who are used to signing up to a single website for the past 20 years or such, seam too complex.
You also end up in a situation where social media managers have to reach engagement and impression targets and don’t think which is best platform that will not be taken over Elon musk or Mark Zuckerberg style, but which will reach engagement targets the quickest.