Thanks for the feedback, all!
One update for @junderhill - we’ve started to make progress with third-party dependencies! There are publicly importable apps that can be depended on from anywhere (with anvil-extras being Patient Zero here 
). If you’d like an app of yours to be given the same treatment, drop us a line at support@anvil.works with the ID of the app itself and we’ll get you set up!
Versioning currently uses the classic Dev/Published system. Watch this space…