All this obsession with power, and no one seems to look at battery performance. What's the point in playing AAA games for less than an hour? Or playing a mobile device, but attached to a power cord?
Well, the performance at 15 Watts here (same as Steam Deck) is still really good and not all that unreasonable. I hear what you're saying, but I raise you another question:
Realistically, how often are you having multi-hour on the go gaming sessions anyway? I never had issues with my launch Steam Deck's battery life. Whenever I have long enough outside my house to sit down and play a video game, I'm typically somewhere I can plug the device in.
I also make this argument with gaming laptops vs a gaming PC and a separate lightweight laptop (tho the battery life is typically better on a laptop vs these handhelds). Actual laptop gaming kind of sucks, and most of them don't have the thermals to handle it— though this has gotten better in recent years, for sure. It was really bad in the 2000s and early 2010s, though. For that reason I typically recommend that budget-conscious gamers who don't NEED to have a single laptop that does everything do a proper PC build and use a Chromebook or a similarly light laptop on-the-go.