I’ve actually loaded AIX 1.3 for the PS/2 on a model 80 decked out with 16MB of RAM, and an Ethernet board, and honestly It was ‘yet another SYSV’
and it didn’t feel like it had much in common with AIX 3.1 on the RS/6000. As always by the time I had gotten all the needed bits, Linux was a thing, running Unix on a 386 with ESDI disks felt horribly slow, and Linux had much better support for stuff. Although if I had the machine when it was the thing to do it’d have been awesome. Not that I’d probably ever get access to a 370, let alone AIX for the 370 + those i860 boards.