Hey hey
I just wanted to ask if you currently plan to support spine 4.x in the near future? I found this post [SOLVED] Spine vs Dragonbone Integration, opinions on those tools and the PR Mvaligursky opened. Is this being prioritized right now? I (and my animating coworkers) hope so 
I’m afraid the work isn’t being prioritised at this stage AFAIK.
Our public roadmap is available here: PlayCanvas Roadmap · GitHub
Here’s a relevant ticket: Support for Spine 4.x now that it's stable? · Issue #52 · playcanvas/playcanvas-spine · GitHub
I’ve tried a while back to upgrade to 4.0, but the changes are substantial and I could not finish it quickly as I hoped for.
Ah I see you posted a link to that issue already, sorry.