There was some talk about the OS size.
LIC believes that the OS size will be less than 1 GB.
Current Switch:
811 MB (0.79 GB) OS
+ 96 MB optional video capture buffer donated by the game
= 907 MB (0.89 GB) max
Switch 2's OS memory usage will not be higher than about 1 GB. If they tack on an enormous video capture buffer, the maximum memory usage could be about 1.5 GB. That's the upper limit.