What does Workbench.library do?

[garyg]

I am going to be installing a new SCSI HD on a dead Amiga
using A4000T installation floppy disks (if the capacitors haven't leaked).

I recall when doing this years ago that there's a slight difference between the
A4000T install disk package and other Amigas: if you use the former on an
Amiga other than an A4000T you'll get a blank screen when you boot up
because of a missing file. Is it the Workbench.library file?

[garyg]

Curious, then, that the OS 3.1 Install disk on my A4000T set of install disks contains workbench.library
but OS 3.1 Install disk (not otherwise labelled, but presumably for my A4000 desktop) does not.