Not sure what the Big Deal is about OS 3.1 anyway.
Lets face it, A BARE BONES OS 3.1 install is not even a skeleton for a usable operating system.
Anyone who installs OS 3.1 likely has numerous patches, utilities, libraries, datatypes, 3rd part audio and graphics routines, menu systems, docks, icons systems, task schedulers, requestors filesystems just to be usable.
The end result is unrecognisable from the original OS both visibly and functionally