I've said this many, many times....
AROS is OS3.1 compatible. This doesn't mean "restricted to".
Exactly the same as MOS or OS4. It has its own advantages and disadvantages vs the other "NG" options, much as the reverse is true.
Some people know this and just like to repeat it like some sort of weird mantra, others simply aren't aware of this.
You all know which group you fall into.