Well that sounds disappointing. These days you're probably better off just running Linux or NetBSD on your old Amigas. But the ability to run true multiuser Unix on cheap desktop hardware was probably immensely valuable to businesses at the time, so it might've been worth it, even if you forgo much of the Amiga's Amiganess. The Tandy Model 16 family was not an Amiga by any stretch, but they had 68000 CPUs and were Unix capable in the form of Xenix. So they ran a lot of small business back office stuff until well into the 90s I'm guessing, despite first coming out in 1982.