When Is 2.21 Coming: Out

If you meant — Blender 2.2x series is very old (early 2000s), and 2.21 would have been released around 2001–2002 if it existed.

If you mean — Linux kernel versions jumped from 2.6.x to 3.x, so 2.21 was never released. when is 2.21 coming out

The query "when is 2.21 coming out" is ambiguous without additional context, as "2.21" could refer to a software version, game update, app release, or other numbered release. If you meant — Blender 2