I seen myself often, while exploring WS, be like "Oh wait, will do that tomorrow as I'll probably not be able to rollback as versionning is not yet here.". I see some other stuffs comes prior to versionning, but imho versionning sound like something really important that should be more prioritized. I'd like to know the point of view of the team about this if possible. thank you :).
If I'm about to make a big change, I'll clone the project which is essentially a backup. Of course this is a workaround and not a permanent solution, but thought I'd share