The Workbench 3.1 natural successor?

[kolla]

Note that 3.9 needs some expansions to run: 68020 processor, 8 MB RAM, hard drive and CD-ROM. It does not run on an unexpanded A1200 for example.

Well... it does run on unexapanded A1200, but the installer wont let you install it on one. Most of OS3.9 also runs on 68000, the exceptions being programs that rely on resource.library that is 020+. That includes all programs that use ReAction GUI. I'd love to hear why c:Makedir is 020+ though