It’s not shielded properly, so the surrounding electronics cause crackles, buzzing and similar noise. AFAIK this was the case for all OLED models on launch. Might be fixed for newer ones, I’m not sure. Apparently it can be fixed by opening the Deck and sticking on some eletric insulation tape.
I have a perfectly capable gaming PC but more often than not, I choose to play on the Steam Deck instead. I already sit at my desk for work most of the day, so it’s nice having a dedicated gaming device that I can take with me and sit in the garden or on my sofa. And of course I can take it with me when travelling.