I’m a console guy. Owned a switch before, but sold it 2y ago because of the lack of games (I liked). I owned a steam account already, as I have a old PC and played in the past and only on rare occasions these days some simple indie games.

Bought the deck for on game and couch (second screen like) gaming. Absolutely love it for simpler, non AAA games.

Not sure if it’s a great fit for you if you own consoles and a switch. Only if you’re interested in non-AAA PC games. Older AA Titles run as well, newer ones may run, but with some compromise.

But you can emulate switch and stream PS4/5 if that’s a thing for you.

Only a new generation, which takes time.
The other handhelds show me that currently you can’t get the same performance with the same battery life and comfort.

I hope that steam takes its time and only upgrades until we see the same experience, just with more power under the hood.