I traded mine away a couple months ago to focus on the MDUW for my percussion needs, to raise some cash, and to get an A4 again. It was a fantastic trade, definitely loving the A4 more and fitting the A4 into my setup easier than the AR.
However listening to the tracks I'm making now with just the MDUW compared to with the AR in there the AR definitely has a more acoustic vibe that I'm missing more and more with each day. And there are a few tricks more easily done on the AR that take some work to recreate on the MDUW. The amp and envelope being the thing(I really miss messing around with the attack on the snare drum).
Also, melody making obvs.
If anybody wants to trade an AR for an OT(never gigged) HMU