Some Game Boy Advance games actually had a software-based sleep mode!

You pressed L+R and Select.

On top of that, I was always really impressed by the GBA’s battery life but maybe I’m just old.

I guess it’s just nobody here cares enough about that to bother with it, not enough artists/creatives around I’m presuming, bummer…

This last sentence is wild. People who don’t write software think it’s so easy, why can’t someone just whip it up?

The lack of artists is totally the reason, and not that building up an entire federated service isn’t easy.