I remember when I first got my Steamdeck I swore up and down that I wouldn’t buy a game cause I already had a library of 2000+ Roms. So what more could I want to play! I had a ton of Wii, PS2, GameCube, and even Switch Games!!!
…Then the Summer sale happened a couple months later and some of the games I like were pretty cheap…
Then the Autumn sale, and a couple more games that I liked were on sale…
…I have now spent a combined total of $300+ on games from Steam (and even then, that’s buying them specifically when sales happen)
It doesn’t affect the battery at all. It essentially just edits to CSS properties of game mode. Since it is just essentially a website after all.