It seems a bit odd that OS4 has less compatability with classic Amiga software than say Windows running WinUAE?
Glaring ommission would be one thought that springs to mind, until you realise that post Commodore, most of the people who persisted with the platform were people who are more interested in the OS and apps than its games.
This is a bit confusing for the majority of past Amiga owners who come from a gaming focussed experience and wonder where all the cool OS4 games are.