Good games, re-release of classics, big library, portable and can be turned into a normal console.
Lightweight, acceptable battery life.... just plain ol fun.

People could ask the same about the Big boy Consoles.

They underperform, have hard time keeping 60fps, power hungry, lots of heat... is not portable, games are expensive, less couch/livingroom coop.....

Great... now i'm wondering why i like consoles now. ha ha