But Kickstart is way more than just the BIOS, it's also the core of the OS.
Personally I'd like to boot directly into my RTG screen without having to screw with flickerfixers or ancient monitors and you can't do that unless Kickstart includes RTG.
A more simple solution would be to get a "small" HDTV TV, you could connect the amiga RCA video out to one of the composite video in and connect the RTG card to the VGA port, you can get the best of both worlds, what you really need is an adapter that converts the amiga video port to scart or component to get the best screen quality.
No, please... let's not, look at EFI instead.
I prefer OpenBIOS, EFI was created by Intel with the evil intentions of removing the control you have over you own computer and giving it Windows or OSX (or any other closed source OS).
As I see it, AROS boot roms for classic machines should be able to boot from supported USB interfaces, boot from CD or DVD or USB drives, be upgraded to support other file systems, etc.
Booting from CD/DVD/USB sound nice until you ask yourself, what I am goint to boot besides Workbench/Wanderer? Linux and any other OS is dog slow and AROS is getting access to the same apps available in linux. ATM I cannot think of any other OS that would be available to boot in a classic amiga, so why bother.
Booting from other filesystem is not really needed, as I explained you can create a boot partition to access any other installed filesystem.
As I see it, all the hard work that would be required to cram AROS into 512kb can be used in other projects, it should be far easier to place only the real essentials in said AROS rom (that can include RTG, CD/DVD/USB boot, other filesystems) and load anything else from hard disk.
Mhh, maybe the AROS roms should fork into two, one rom for classic amigas so they can run the latest AROS and one for emulators/minimig/natami with the intention of reimplementing the original kickstart (even if it doubles in size to 1 Mb).