Hi Gulliver
I'm not avoiding 3.1, most of my machines run KS3.1;). OTOH, I'm reluctant to abandon all examples of Amiga OS evolution, especially OS2.1 and 1.3.
I've read many times about how superior 3.1 is over 2.1. Being a simple user (not a degree'd computer scientist), I'm often hard pressed to confirm that it really is a huge improvement, especially on older OCS and ECS Amigas. Some off-the-cuff specifics, the Datatypes scheme is OK on a fast Amiga, but dog-slow on lower spec models. I frequently use my favorite datatype-unaware utilities for speed, even on the 060 model. Also, the palette prefs on 3.1 seem like a leap backward compared to OS2.1. Someone wrote a wonderful animated busy pointer that I cannot get working with KS3.1. Etcetera.
Frankly, I have a great respect for the one-stop compilation of updates and improvements you have organized for OS3.1. You did an excellent and thorough job!

Whenever I reformat and reload the OS, your BetterWB is the first enhancement I install.
My intent here was to explore what updates could be applied to OS2.1. I think it is worth having a 'living' example that can read long-file-name CDs, swap icon images without renaming, etc. If there are bug-fixed libraries and device handlers for OS2.1 too, I was hoping folks would share them in this thread.