I’ve been wondering the same thing. I and others have raised the concern for earlier Dremio versions, but there doesn’t seem to much consistency. Previously, bugfix versions marked as enterprise versions were pushed, although not part of the official policy.
The same goes for the dremio-oss repo on github as well as maven artifacts. Some historical threads attached in the bottom, but the tendency seems to be that the lag from release notes to artifacts being available is increasing.
It would be nice with more clarity regarding what would be reasonable expectations from the OSS community. There can be lots of good reasons as to why things are they way they are, but it does create frustration when everything around the process seems to be inherently closed.