Hi @eccentric3D ,
Maybe some Fundamentals will get updated. Furthermore new Courses will use more recent Versions, but updating all Courses would prevent new Courses to be made and to what Version should they be updated?
You talk about it, like 4.0 and 4.1 are mostly the same, but look at a small taste of the state of 4.1 at the moment:

Completely different from 4.0 already. Blender evolves too fast to update all tutorials.