Another one that gets me: buying things but not actually owning them. You buy a game but you don't actually own the game, you own a license to play a game on a service that might shut down sometime in the future or change their mind about the license they sold you. You buy an e-book but the storefront you bought it from might change or remove it, and then forcibly update or remove any copies you have on e-readers. Most people don't even buy movies or TV shows, they just subscribe to some streaming service, and if they do "buy" an electronic copy it's the same issue as e-books.
At least physical copies of movies and tv shows and books are still a thing, but even then we're heading towards a future where physical media may require phoning in before it'll play.