The Apple Silicon fanless MBAs are great until you end up in a workload that causes the machine to thermal throttle. I tried to use an M4 MBA as primary development machine for a few months.

A lot of software dev workflows often require running some number of VMs and containers, if this is you the chances of hitting that thermal throttle are not insignificant. When throttling under load occurs it’s like the machine suddenly halves in performance. I was working with a mess of micro services in 10-12 containers and eventually it just got too frustrating.

I still think these MBAs are superb for most people. As much as I love a solid state fanless design, I will for now continue to buy Macs with active cooling for development work. It’s my default recommendation anytime friends or relatives ask me which computer to buy and I still have one for light personal use.