Verdict on Switchbuntu:
Cool as shit, but if you were looking to turn your Switch into an dual-booting Ubuntu tablet, it's not there yet.
Part of this is that the touchscreen driver is a little jank, especially around the edges of the screen—and sometimes the touchscreen just stops working. This is fixable.
Part of this is performance—sub-30fps on a RetroArch menu is headscratching, especially given Lakka.
And part of this is that Ubuntu is not ready to be a tablet OS.