The end of full USB installs of ubuntu/derivative linux distributions for legacy systems?

All this because of a bug with the ubiquity installer that mismaps (and it is next to impossible to correct) the location of the bootloader.
Reinstalling GRUB doesn't change anything.
Removal of the FAT32 EFI boot partition and installing grub to the main EXT4 partition where the system is installed to, also doesn't work.
Installing to a solo ext4 partition and manually installing grub doesn't work either (despite marking it as "boot" in gparted).

However, debian and other distributions don't have this problem (they don't use ubiquity), so unless you use an NVIDIA graphics (PCI-e) card, you are free to use any/all distributions for a NON-UEFI USB installation on older machines.