Interesting. Any particular reason you feel alternatives like Box or Dropbox are safer?
On the one hand, I’m pretty convinced it was Obsidian per se. On the other, I don’t understand quite what I did wrong, which is the scary part.
This might verge on a feature-thought:
I do lots of coding and markdown using Rstudio. I always work on active files stored in Google Drive. Saving in the Rstudio IDE is expected to be manual (command + S). But if Rstudio quits and there are unsaved changes, those changes are by default stored in a local, non-cloud drive file, so on re-opening, the user looses nothing. Would something like this be possible or relevant for Obsidian?
Similarly, anyone using gDocs will know that losing any changes just does not happen, whether or not docs are stored locally. One becomes habituated to not manually saving things.