Yeah I agree, Blender development moves too fast to catch up. In the time it takes to completely produce a course, Blender has changed yet again already, it’s the sad nature of the beast. It would be ideal if courses could be updated as fast as Blender, but that is too difficult to achieve. That said, it comes a time when a course is too behind that needs to get updated, but some major Blender changes are needed to justify the production time and cost.