I’ve been working in Outline view +columns (0,000s items) with no problems. This would suggest it’s not the view per se - I’d look at agents which might be trying to update the outline you’re working on or complex display expressions.
Tinderbox is saving in the background. in my beta-testing ‘het’ - I probably see more crashes than most (though still actually remarkably few!) and the only data loss I ever see is the current edit - maybe the last minute(?) of changes. Unless you’re an extremely fast typist , any loss should be minimal. short of saving every keystroke, there will always be the chance of losing the very last few keystrokes.
Getting to the cause of the crash is more important and i’d encourage anyone getting crashes to email the crash logs to Eastgate. Posting here is fine but fellow users generally can’t fix crashing problems.