What are they trying to say with that? (Genuinely don’t understand)

What’s the pushback against it? I like that you can modify and publish version of it as long as it’s noncommercial

Edit: I don’t understand the down votes, I’m trying to learn - what are the downsides of this thatkmake so unpopular?

Are you an expert tho

Anecdotally, so far I’ve noticed cars getting louder

Exacerbate = the rare minerals issue?