I'm basically just saving on file size, because most people don't have screens that can display at such high resolution and can zoom in as required.
That's fair. I only have a 1080p screen, so I'm certainly not making use of the size except for the fact I can zoom in a ton without things getting fuzzy. I'm just overly picky
And it requires using an appropriate font size, since obviously the default font with 48px _is_ for 4k screens which I'm guessing would complicate the LNP a bit.
That said, for anyone that stumbles upon this thread - give 48px a try, even if your screen isn't the "correct" size (and can handle the extra processing work). With TwbT, you can easily zoom out to compensate without hosing your menus, and you get the advantage of "infinite" zoom. Maybe I'll realize this isn't practical down the road, but for now it looks amazing.