“There doesn’t seem to be a mad rush to create block themes, but this could be due to theme authors’ lack of skills and reluctance to give up established, more efficient workflows.”

Or maybe a lot of people cant afford to spend the time and the effort to learn the new things and in 6 months all has changed again. Unfortunately this and the lack of a centralised course to teach all the new dev basics keeps me from diving into the topic. (or maybe there is a course that gets updated when the core gets its new stuff and i just dont know it yet)