In what way is the Amiga-enabling ROM a limitation on the hardware?
Hardware X: This can be sold to anyone, regardless of OS. It doesn't come with any OS bundled, it doesn't license any software company's trademarks, it doesn't have any hardware license verification mechanism (in marketing a.k.a. "anti-piracy measures" or "Amiga-enabling ROM").
Hardware X, but in its licensed (per)version: This has to be sold bundled with AmigaOS after having been modified in "any way which the vendor chooses" (to paraphrase Ben Hermans attempt at "clarification") and after the vendor has become an Amiga Inc. licensee. Of course this also has to be more expensive than the same hardware in its normal shape, due to the licensing process and the following limited market size.
Which board is limited in the eyes of the consumer who doesn't give a crap about AmigaOS? And why shouldn't he have the possibility to buy AmigaOS separately to install on his hardware if he so chooses at a later time? Is his money less worth to Amiga Inc. because he cares more about the capabilities and price of his hardware than what comes bundled with it at the time of purchase?
The very essence of all this is that the hardware market for AmigaOS users is unnecessarily (as in: for no technical reasons)
limited.
Are you saying that an abolishment of the compulsory dongling/bundling/licensing idea would be any more limiting?
Unless you can successfully answer this question with only hard facts and logical reasoning, you are going to be written off as an Idiot by many who up to now merely considered you a bit thoughtless.
That's alright, you should be used to insulting me by now...

Remember, you are speaking to someone currently running Linux on the AmigaOne with the ROM already in place.
Oh really!? Well, I have a black bicycle with red stripes!! So what? :-P