i have just restored my 3.x mediator +++ setup i needed the other day after demotivated trying to get around my pc multi-track hard disk recording tools like cubase, and my a4k 060/50 is like a fresh wind. i wish hd-rec with ahi and p96 pci drivers would already work with aros68k, since then i might be spared to restore my hd setup from 2009, which still was easier than windows or apparently preferred os4 clean setup. an a4k like that works like a charm for multi track hard disk recording, a thing you wouldnt expect from a 50mhz machine.
other than that i still have put my hopes with aros(68k) as closest to genuine amiga as i can tell.
