The Air is silent, it's powerful enough for fairly serious dev workloads, it has a battery that lasts longer than I've ever seen before and it can run multiple displays if you get a compatible displaylink dock.
If you like it, there's little reason not to get one AFAICT. Make sure to grab the 16GB of RAM though!
This pushed me to the 14” MBP with 16GB and 1TB. You can literally get it swapped out same day at apple stores if anything goes wonky.
Is it really weird to me how little-known the art of cross-compilation is. You can target x86 from an ARM build box, or the other way around.