Honest question here - not trying to be snarky or incite a flame war: do people honestly believe that potential Vampire 2 owners are more interested in running AROS on their Amigas than 3.x?
I've tinkered with AROS (68k and x86) out of curiosity and I commend the devs for their dedication to the OS and the countless hours they've invested in making it *but* from my perspective the user-base seems tiny even in comparison to OS4 and MorphOS - having used it, I can't think of a single reason to run it on a classic Amiga - even one accelerated by a Vampire.
I can't help but think that those in the Amiga community that don't consider either AmigaOS 4.1 or MorphOS as 'true' Amiga successors would feel exactly the same way about Vampire/AROS. If and when I do buy a Vampire, It'll be to run 3.9 - and if Cloanto, Hyperion or whoever wants to restart development on AmigaOS 3.x then I'd be more than happy to pay for that.
Aros is a reimplementation of the 3.1 API including intuition, gadtools and many others.
Upon it you can use not only the limited default desktop but also Scalos and even Magellan (both old one and new one). When using Magellan you can even use MUI 3.8 on it (what I did). It includes additional several patches by default, moving screen out of window, AHI, CybergraphX and so on, there is PCI support and USB-Stack (Poseidon), both on 68k untested but potentially working, network stack and so on. Wawa managed to get MESA/Gallium working on 68k (though slow but who knows what future brings). I do not make judgements about X86 because I am mainly interested in 68k so I cannot say anything. On 68k what did you use? If my distribution then I tried to include as many features as possible, I orientated at Amikit not 3.1. I know that not everyone liked that but because I do not get money for it I try to do what I like. For me my distribution was a testing field what can be done with Aros 68k. For real hardware and FPGA that would be too much of course. I use the old Magellan on it so where is the difference between Aros and 3.1 if you configure it the 3.1 way? But of course it is called competition, Aros is a offer, you can use it or let it.