The successor to Nintendo Switch named Switch 2 will continue to be a hybrid console that can be played on TV and in portable mode, it will be launched without an OLED screen (it will have an LCD) and it will have cartridges/cards for physical games , according to various sources. Anonymous to VGC, where they say that the device is “likely” to hit stores in the second half of 2024. They add that there are already development studios outside the Japanese company with the development kit.
Switch has been out a lot longer and has a bigger company behind it. I don’t think anyone ever expected SD to catch up in sales. However, the SD has clearly had an impact on the handheld market. And without tinkering, it functions way more like a console than a full PC.
And I don’t know what setup you used for switch emulation, but I’ve emulated several switch games with perfect success. I certainly mostly play my switch games on switch, but I’ve put a handful on the deck for travel and it’s been great. Along with my 3ds games since my actual 3ds went to electronics heaven.