ArcaOS is doomed, to put it mildly. Arca and eComStation were never given access to IBM source, so everything is bolted on through binary patching.

If it's still using IBM code, then it definitely will. IBM's OS/2 kernel, even the 32-bit one from 2.0 onwards, had 16-bit code and the extra ring usage for IOPL.

Then there's the fact that the rest of it is 32-bit. (-:

Hi. Article author here.

Yes, it will.

I am currently evaluating Arca OS.

It currently does not run on UEFI machines anyway, although a version that can is in beta and they're getting a copy ready for me right now.

I doubt it. This is probably talking about early versions of OS/2, like, pre-2.0.