A plain and simple no-nonsense kickstart, with scsi.device and filesystems that grasp big disks, that is all that most people really want. To boot strap. Not the entire OS in a slow to read ROM chip! Luckily creating custom kickstarts has become easy (one could even offer a web service to do it), and with some luck, flash based ROM replacement kits will finally emerge too, so one can easily upgrade kickstart on real classic hardware too. Personally I am going the FPGA route.