Why don't many modern games have save slots?

[AbbathTheGrim]

I have the suspicion that most developers these days went with checkpoint saves for simplification and practicality of the approach.

Maybe they think some gamers forget to save, can't tell when there is danger ahead/when they should protect their progress and they could face a game over, be pissed at losing their progress, and blame it on the game.

I don't like checkpoint saves but I don't cry because of them either.

My example of a perfect progress saving system is the one in Fallout 3.