Since it’s so quiet here, let me start :)
The Steam Controller, albeit being discontinued in 2019 is still going strong here.
I like that you can easily replace the two AA batteries and even though the original wifi dongle broke somehow, it is possible to just link it with Bluetooth as well.
I’m disappointed I missed the chance to get one of these. It seems like such a cool thing. I’m holding out hope that they’ll revisit the idea someday.
There seems to be murmurs of them doing steam controller 2 - just basically a controller based on what they already have on the steamdeck but as an external controller.