I’d say there is nothing too wild about my peripherals: 1080p60 display, USB mouse and keyboard and the occasional PS4 controller. Everything is indeed pretty much plug n play. However in my experience things go south after a while (sometimes days, sometimes weeks) and get fixed after a full restart cycle. Hard to say where it comes from exactly but the dock is a prime suspect.
I have noticed that trying to return to gaming mode after a long period in desktop mode triggered a reboot more often than not. My impression was that Steam updates that occur in desktop mode would trigger a restart, when attempting to return to gaming mode. That made the SD feel janky, with long restart times.
Don’t get me wrong, I found the SD to be a very versatile device, priced very competitively (compared to low-end gaming laptops for example). I will likely buy its successor if and when it comes out. As a portable gaming device, it’s the best deal around. As a daily driver PC, it’s okay but not great.