As there are no native AmigaOS 4 applications for now yes indeed it's hard to be compatible with them. In fact the "AmigaOS 4" we see in the screenshots isn't compatible with these applications too (which is in fact an AmigaOS 3.x with some components planned for AmigaOS 4)
Amiga, Inc....with all the usual disclaimers about this confusing company....shipped OS 3.9.
It supports PowerPC expansion boards, but I think most people consider the first Amiga PowerPC OS, to be OS 4.0.
I don't think it does the MOS camp much good to deride beta software as being buggy, problematic, with uncertain release dates. All these things may be true, but MOS is also still in beta.
It is a solid argument, to only consider shipping software, but if we must do that, then only Amiga, Inc. has a shipping os, that OS being 3.9.
I don't think any of us want to do that, however, as we want to compare PowerPC os's and that by necessity means being forward looking and examining beta software that is not in general release.
I don't really care that the beta testing circle is slightly larger in one camp than the other, the fact is I cannot buy either one...and so, I will have to compare these softwares, both of which are unavailable to me currently.
And as I look at things, MorphOS, which has yet to be released, and therefore is over a year behind in being even OS 3.9 compatible, is not looking like its going to be OS 4.0 compatible anytime soon, maybe in MorphOS 2.0???
Its an important question, though I don't doubt there is inherent difficulty in being compatible with an OS that hasn't been released....nevertheless, THAT IS YOUR PROBLEM.
My problem as a consumer, is buying hardware and software that isn't going to be incompatible and leave me out in the cold when I want to run my favorite Amiga OS PowerPC applications.
Maybe someday I will say I want to run my MorphOS applications, but not today, and I'm not convinced by only the tiniest smattering of developers that MorphOS is the way for me....tales of tamar?? who cares....maybe its a good game, but I hardly care, there will be good games for Amiga OS 4 too.
You'll have to do so much better than that....I am glad you are working on it, and if you succeed, again, I will be there with you....but its no time to celebrate, thats for sure.
If I have to predict, you will fail. The various amiga companies have certainly failed themselves enough times, but all of the would be usurpers have done, by and large, even worse.