Ditto, I'm not really worried about the complexity of my GRUB config - just that it works. It tends to if I don't go poking/looking directly at it.

Leaving them to manage the config has worked a-okay for me, even with a cmdline that would cause shudders in most. grubby has been a frustrating introduction

If I were to invest any effort in my bootloader at all, it would be to get closer to the 'metal' through systemd-boot/efibootmgr

TLDR: looking at the GRUB config invokes a "why am I still doing this" emotion, I'd rather not