Go back one version, 7.0.1 was the last version where one can make a truly universal boot disk that will boot any Mac made up until that version of System/Finder was created.

After that, it all goes to hell. The concept of a universal boot disk died with System 7.0.1, after that it just wasn't reasonable/possible to get everything necessary to fit on one single floppy. Even with 7.0.1 and nothing but System and Finder, there is only something like 168k left on the floppy.