That's the thing, booklets used to be thick with nice pictures and some info about the game (Blizzard games booklets were the best!). Nowadays, they're a one page folded in two at best.
I’m always enjoyed the physical connections with games. To an extent, the booklets themselves were part of the lore.
Nowadays, sometimes they are online or within the game. Crazier, games come with ads for other games.