Since almost all PCs are made for Windows, what's still needed is a bootloader that is as easy and straightforward to dual-boot with Linux as the regular Windows bootloader is under BIOS.
The problem arose with UEFI where the "same" Windows bootloader is hugely defective by comparison, still a complete failure at dual booting Linux. Still works perfect under BIOS though.
Ideally Limine would be truly portable and even simpler and more of a copy-into-place bootloader than something that needs to be "installed."
Looks like Limine is focused on the goal of smaller binaries than Grub2, which is quite admirable, but continues getting more complicated for users than Grub.
I would imagine it is possible to set up a dual-boot Windows/Linux SSD or HDD and after that have it perform ideally using Limine.
There is just no sign of any clue in the documentation how anybody would even get started on a most basic and commonly-needed dual boot configuration like this. And the complexity is increasing to where it may be more challenging to sift through if you wanted to figure out how to do this in the future.
Naturally Grub2 is perhaps more complex, but setting up dual-boot is more straightforward in ways Limine is not making any progress in that direction.