I can fully understand developers being careful about releasing their upgrades now. XP12 is a great experience, but Laminar isn't really done yet with tuning and adjusting things. With Zink they even introduced a major change that was probably planned for 12.0 originally, but got delayed for whatever reasons. It has been the same with XP11; the first few post-release updates (iirc up to 11.10) were breaking add-ons over and over again. There is one more pending big change I see coming, and that will be addressing VR support (probably entailing changes to parts of the SDK). If that one's rolled out, things might settle down a bit (Laminar adjusting & improving things like VRAM management or AA won't break add-on aircraft).