I just bought a used A1X and used it for first at an event gig yesterday. It worked super intuitively and produced great images under a tent with bright back lighting. I directed the light at the ceiling of the tent and I was shooting with a Z8 BTW.
Because the A1X and A10 have Bluetooth, they can work with the latest Profoto TTL transmitter (Profoto Connect Pro) and provide individual power readouts on the transmitter. If that’s not a deal breaker, the A1X and A1 work great with the older Air-TTL transmitter (prior to the Profoto Connect Pro). You can vary power remotely, but no readouts of power levels on the transmitter.