I'm sure if a cabinet was rated at 6 ohm some would think their amps would not run it.
You HAVE NO IDEA how many people think this.
I once rated a cabinet for 6 ohms (because that best described the overall load on the amplifier).
I got lots of calls asking where to buy a 6 ohm amplifier, because none of the manufacturers listed it.
I then rated it for 4 ohms and the calls stopped. The cabinet did not change.
The lack of basic understanding in our industry is astounding sometimes