This is a significant peeve of mine. The need to explicitly specify resolution in boot managers is annoying for both laptops and machines that aren’t always used with the same monitor, because no matter what it’s going to end up in fallback with an ugly stretched resolution some portion of the time, rendering beautification with themes somewhat moot.
This limit made sense 20+ years ago but today it feels highly anachronistic, kind of like finding a corded rotary phone mounted on a wall in the kitchen of an otherwise cutting edge home. Surely it’s something that could be fixed?
May be, but this is so minor in general, that I barely care as long as it boots properly.
Way bigger annoyance is that grub still doesn't support luks2 and uses some gimped variant of libcrypto without proper hardware acceleration that decrypts boot volumes for almost a minute. That is way more serious than boot resolution annoyances.
My pet peeve is that grub repartitions windows disks on chain load, so if it ever boots with the disks remapped, there's a chance it'll plow apart the partition table of whatever poor disk got mapped to that hd#.