Oh wow this is one of the major things I always look at before making decisions if the app is worth it for the long run. Hopefully this is part of your priorities.
Backup safety of files is a major concern with todays cloud or based files being saved. Having the ability to save a WIP project is comforting that we can continue to work with the files storing them in a selective cloud or local place.
As everyone here is concerned about the changes being made, if a Hobby subscription doesn’t have a way to have back ups file format to keep working then its problem. I could understand all the suggestion being surreal but give us something to really be able to work with.
We all know a project can’t be done in a few hours and export to STL and be done with it even if the files are deleted. My hopes for this is to have the Hobby subscription change to save files and import SHAPR3D format to continue to work with the files at least. This will make the files open in SHAPR3D and no other app or program.