That article is serious flamebait. It's like going into comp.sys.amiga.advocacy and asking "what makes the Amiga so special".
It may be a sucky idea to some people that dongle'izing the A1 hardware so that OS4 won't run on non-official Amiga hardware, but at the end of the day, Apple made the same kind of decision (stopping the Mac clone market), which may have been for better or worse for it. Yes, it would be more convenient for consumers to have a greater choice, but [generally, heh :-)] business produce products to make money.