@copygirl *forgets mastodon existed, for a week*...
Well... having researched bloxel engines for nearly a decade as a hobby, I recently began sharing the resulting ideas&concepts, and apparently people like 'em!
Yes, ECS can be quite useful for bloxels... if done right.
The 'language' in that picture is a declarative data definition format, based on LISP and JSON: https://raw.githubusercontent.com/Longor1996/TCGE/master/docs/cdml.ebnf
(The linked repository is a universal bloxel engine, written in rust... it's a extremely slow work-in-progress)