@UnseenAcademical Thanks a lot for the good explanation. I really didn't know what it's all about, but I definitely know more, now.
For me 40k always looked like a really wasteful hobby, if it's about resources and sustainability.
There is a lot of hazardous stuff (plastics, glue, resin, ...), which can't even be recycled and a lot of stuff lands in the trash can.
I even saw people creating huge landscapes to just play for a while on it with their figures and then throw away most of it, because they don't have space to store it, repeating this process at the next tournament (or how it's called).
And while getting more information on 40k, I figured out, that even planed obsolescence is a thing too: https://www.youtube.com/watch?v=5DEmAwofzDE
What do you think about my observation?