https://www.datagubbe.se/utildisks/

Excellent dive into Amiga boot/utility disks, how they crammed so much onto one floppy, and the cool menus designed for them.

Many users constructed a boot disk, onto which they put essential parts of the operating system, support files and the programs they used most often. This wasn’t as impossible as it might sound, because a sizeable portion of the Amiga operating system resided in ROM and would happily boot to a CLI prompt off a blank floppy. It was simply a matter of being discerning and pick the stuff you really, really needed.