Yes, I was thinking that too. Apparently not even the poster has put anything on the database.
Projected Compatibility Report for Amigan Software Products----------------------------------------------
Hopefully all Amigan Software programs should still work under OS4.0, as it is all written to be system-legal. Conceivably there could be latent bugs/assumptions which only show up under OS4.0, or the other alternative would be that OS4 is not fully compatible with the existing APIs. We will be accepting OS4.0 compatibility reports as bug reports and investigating and fixing any problems accordingly.
Also they apparently had to reverse-engineer and reimplement the functionality of OS3.5 and OS3.9, so if there are flaws in their reimplementation this would show up by modern OS3.9 software such as Report+ not working. There's a bit of hardware bashing in Worm Wars so it likely won't run on an AmigaOne due to nonexistent hardware. There shouldn't be any problems whatsoever with Saga, HowDif, Draco2C, Annotate, ACSE, etc.