216
I never knew that USB-C extensions are not allowed for a reason
(www.youtube.com)
This is a most excellent place for technology news and articles.
If you buy a Steam Deck, or the Lenovo laptop I have for work, the only charging options you have are USB C. Their standard chargers put out at least 60 W, and they aren't particularly special. In fact, I'm pretty sure 20 W at 5 V won't be enough to supply these while in use, so you will either be using battery with long charge times in between, using them with battery-assisted power for longer use times until you hit those long charge times, or using the 60 W or more at whatever voltage the chargers provide.