I built this thing in 1998 and at that point it was already a retro-computing system, the SE/30 has such a compact form factor it felt like a toy back then, really. I paired it with a IIGS ADB keyboard which is nice and compact too. Back then you needed boot floppies and SCSI CDs and things...
I have kept an SE/30 for ages, made a Franken-Mac with a SE/30 good logic board in an SE chassis all salvaged from the trash. I worked at Apple then, put an ethernet card in this thing, installed NetBSD on it and ran it on the LAN as a toy server for years as se30.corp.apple.com (ran a NeXT slab...
Just to add one more note on a success with an SE/30, I set the previously mentioned Shoebill image as a boot volume on a ZuluSCSI adapter connected to a SE/30 with a MacRominator II. It is pretty slow compared to other Mac OSes of that era (unsurprisingly), but it boots and runs.