[rcxdude]

Grub is just unnecessarily complicated. Simpler options exist (even ones with the same level of flexibility, though I am most familiar with embedded options there: Something like barebox shows an alternative approach that could be applied to desktop: basically just make a shell environment in your bootloader to script your more complex requirements). But 90% of users nowadays can just use systemd-boot.

[a3f]

barebox can be compiled as EFI payload and used on Desktop systems. The main impediment is packaging it for the OS and scripting the hooks that would write e.g. bootloader spec files on kernel updates.