There are still bugs for several games, you cannot play in portable mode and you cannot play online unless you use a custom network used only by emulator users with a specific build.
Sure, but for most games, especially single player ones, which are usually what Nintendo exclusives are mainly, it works fine. I'm not sure why I'd want to play in portable mode at all, as opposed to docked mode. I am on an emulator after all, it shouldn't make a difference.
Portable mode has a reduced resolution and so potentially better performance. (on the real device at least)
Yeah but on the emulator it's negligible when I already get 4k 120 FPS+ as I mentioned. You might get a slight boost if you have a low spec machine but I just tested this on an older AMD laptop and the difference is a few FPS between portable and docked modes in either emulator.
Interested to know what your specs are for 4K 120FPS. That seems like it would require a very high end GPU, pricey kit these days! I'm getting sub 30fps with a 2060, which is still a decent mid range card.
5900x and a 3080 for me
... Switch is a 2017 device with a graphics core from 2014 with games already optimized to run fine even in the portable mode on a screen less than HalfHD.
You can already put Yuzu into portable mode, I think what they meant was literally playing portability which you can only do if you have a Steam Deck or similar handheld PC