I no longer really use the deck to play games stored on the device when I'm at home. I set up game streaming from my ageing gaming rig, 32gb ram and a super 2080.
I stream using moonlight on the deck and Apollo on the rig, the rig does all the heavy lifting.
If u set the streaming resolution to 2560x1600, double the deck resolution it looks awesome.
The only other setting to really change is to set the deck as the only monitor not multiple monitors and to set always use virtual display.
The other thing I did initially was set up a hotspot on the rig to connect the deck to like it's own Lan for the traffic to go through. I later changed this by plugging an old Asus router in ap mode via ethernet in to rig and the main router to connect to it so the router deals with the traffic.
Was playing atomfall last night for first time after buying it as a discount.
Plays great no lag very smooth great visuals.
Playing this way I can still play new titles with no issues.
If u have a rig and a deck I would encourage you to play this way.
The deck will last me years more using it this way and the battery life while streaming is fantastic.
Sell the switch my gen one is lying in a drawer. I used to stream to my switch but it wasn't moonlight I used it was another app by an independent developer but I can't remember who. Was a long time ago. Finished fallout 4 this way and also 100% the Goldeneye Xbox 360 leak.
Unless it is a handheld console I won't play it now.
I mostly play it lying on the bed tbh.