I’ve been using Matrix/Element for around three years. I have there my family, a couple of friends and a couple of services that use it for alert, information. I host a non-federated server on a VPS in Germany. My approach has been simple: do you want to chat with me? Use Matrix. Otherwise, call me or send me emails.
If privacy is important for you, then make it a priority.
You could creating an image of the drive under Linux, using dd. Then the recovery could be attempted on the image (assuming it does not contain sensitive data and can be shared).
For your information, in case your curious, a similar interface (that I use) is: https://cowlark.com/fluxengine/doc/building.html