Earlier quoted context omitted.
The messiness of resolutions during boot always annoyed me on PCs. It was understandable back in the days of BIOS, but ith the advent of UEFI it seems like it should be possible to run EFI config screens and the like at monitor native rez (or at minimum, native aspect ratio) but I’ve never seen this… it’s always 1024x768 or somesuch stretched to fit a 16:9 monitor which looks awful.
EFI config screens should be text mode only, full-stop. So they can easily be used over serial console redirection. Ran into one recently that was high-rez graphical. It needed a USB mouse to change critical settings because the tab order for the onscreen widgets didn't work. Anyone responsible for creating graphical EFI config screens should stop writing software for the good of humanity.
UEFI actually lets you provide both touchscreen-capable bells&whistles gui, and a text UI for the frankenstein VT-UTF8 standard (essentially, VT-220 compatible with UTF-8, kinda like linux console) - all in mostly one codebase.
There's a standard UI description language which is used to specify menus, options and values (and how they are written into nvram), which is then interpreted by text mode interface driver (enabled when you connect over serial port) and graphic mode interface driver (where you can drop all sorts of graphical bells & whistles).
It's also how you can integrate menus from add-on cards into firmware setup.