FWIW, I've been tinkering with Bevy since like 0.6 I think, and don't remember many (if any?) patch breaking changes.

I did skip 0.7 since I remember upgrading from 0.6 to 0.8 directly, though.

The minor jumps are sometimes very small changes, sometimes giant ones (but alas, it's still a 0.x project, so I got not qualms)