Steam controller. I waited for them to release a v2 with embedded battery and better build quality and it never came. I guess the Steamdeck benefitted from it, but I'd still like it as a controller.
Oh, very much so. Because of vision issues, I need to plug my Steam Deck into a monitor to play comfortably, but the USB-C connection isn't reliable enough while actually using the Deck as a controller. I need an external controller for my deck, but one that's as good as the Deck (non-negotiable requirements: gyro, back buttons). I wish I could just order a Steam Controller v2 (with two sticks, just like on the Deck).