My one big complaint is battery life. 2hrs for most games. Its a great at home device... but on the go and car trips are a hassle. There are battery extenders but they make an already chonky handheld into a 15lb brick.
Many less demanding games can run with a ~7w TDP limit at 60fps without a hitch at full detail. This yields massive battery life improvements.
For modern AAA games you'll probably have to frame cap 30-40fps and lower detail settings in-game.
Setting the refresh rate to 40hz helps a lot too.