That was an issue with older BIOS versions which also often didn't fully support LBA indexed sectors.
Any system with a UEFI BIOS that has 'CSM' (compatibility support mode IIRC) should support arbitrary placement of the /boot partition.
Today the main reason to put /boot early is for migrating to larger drives later, the start sector of many filesystems (including windows) can be left in place, and the size of the last partition, the data/system partition can then just be expanded.
Any system with a UEFI BIOS that has 'CSM' (compatibility support mode IIRC) should support arbitrary placement of the /boot partition.
Today the main reason to put /boot early is for migrating to larger drives later, the start sector of many filesystems (including windows) can be left in place, and the size of the last partition, the data/system partition can then just be expanded.