I still can't get the difference between måltid and mat or måltidet and maten :(
The "formal you" is, by and large, no longer a thing in contemporary Norwegian. For this reason, we have left it out of the course entirely. No Norwegians I have met use it anymore.
I have met some that use it, but they are mostly old people. And the few younger people i have heard use it, always get annoyed looks "are you old or some kind of hipster?" is basically the reaction.
How different is: they are eating, From: they eat? What exactly does spiser mean?