Even if you’re correct, it’s still too early, anyway. That’s my point.
The DS had a seven-year lifespan and the original Switch had eight. Even living room console have an average near decade long lifespan. So, of course Valve isn’t going to throw their money into a second generation.
Nintendo wiped the floor in the mobile gaming market for decades despite their competitors having beefier specs. The DS lasted for years before we ever got the Switch. Let the Steam Deck mature.