The Amiga 1000 (that came before the 500) didn't have the "kickstart" in ROM, so you needed a kickstart disk for the 1000. The Amiga 500 and later had the kick

The Amiga 1000 (that came before the 500) didn't have the "kickstart" in ROM, so you needed a kickstart disk for the 1000. The Amiga 500 and later had the kickstart in ROM and many of us would mod our Amiga 500 so that we could use a switch to select between kickstart 1.2 or 1.3. But even on the Amiga 500, that still wasn't a UI from ROM: you had to use the "workbench" disk to get the UI.