Just how many angels can dance on the head of a pin? Or more importantly, how many demons can skate on a snowflake? How much purity is needed?

The best licences protect everyone. This one seems to do a pretty good job of protecting both Prusa and the consumer. Is it perfect? No. But it’s far better then Prusa getting raped and pillaged into nothing. And it goes a very, very, very long to protect consumers access to parts and design specifications.