That seems less bad in the sense it would affect fewer people, but the ones it did affect would likely be much more strongly affected. For instance, I could imagine someone with an old daemon that had a too-level loop like:

  while True:
      try:
          serve()
      except:
          log(‘oops’)

so that it was more or less bulletproof. This might be a highly unpleasant change for those people who counted on it running 24/7 and never dying.

In other words, the current behavior is a minor hassle for many people. That change would be a major hassle for a few.

I’d be all for a deprecation warning on bare excepts. That might nudge a lot of people to fix their code without actively breaking anything.