Any examples beyond Star Wars dice? I haven't noticed this at all.
WFRP3ed tried it. Changeling the Dreaming tried it. There have been other games, but nobody has ever had major success with it.
Star Wars gets away with it solely because of the license.
Now, there are companies selling things like class-specific spell cards, Drama Decks, etc. etc. etc. But those are all such optional bits of bling, that I can only mention them for the sake of completion. Like a collector would think.
Overwriting doesn't seem like much of an issue in 5e to me, or most other modern RPGs, where the emphasis on simple rules, quick chargen and getting a game to the table means that the books are way more concise than most of the games from the 80s or 90s.
Yeah. I mean, there comes a point where I think people are bitching more because there's stuff out there they want and can't justify buying than anything else. "People are buying stuff I don't like" just seems like a weird thing to get upset over.