The answer, “ use whichever version seems appropriate to the job at hand“. This change obviously begs the question “ which version of Blender should I use?“. bug, security and usability fixes, whereas Blender 2.9+, the Foundations active release (at time of writing), essentially continues to follow the normal release schedule ( subject to the name change) with the latest features, bells and whistles, being supported only so long as the version is ‘live’. Why is explained in this developer post, but for all intents and purposes the two versions, Blender 2.9+ and Blender 2.83 LTS, are essentially the same with one main exception Blender 2.83 LTS is ‘feature locked’, it won’t be updated or changed with new tools, features or functionality but will instead receive extended support (two years) to cover core performance, i.e.

With the recent release of Blender 2.9+ there are now two active versions of the application available for use the current Blender 2.9+ release and Blender 2.83 LTS (‘LTS’ = Long Term Support).

Current version of blender