It’s also a lesson from the O3 frontend where we started almost everything at version 3.x and, consequently, when we released RefApp 3.0.0, we had 0 modules on version 3.x (we released versions like 5.6.0, 8.0.0, and 7.0.0 because of the changes we had to make overtime).
Anyways, key point is that we’re not yet at the point to think about module branching. When we get there, as Daniel said, we’ll do the 3.0.0 compatibility in the main branch and create a branch for pre-3.x compatibility. The first thing we need to do is dig into making 3.0.0 core work.