Their M-Series SoCs are also popular enough that they're the face of AI outside of GPUs and datacentres, and they were pretty big for the whole computing industry, especially given the whole reputation Macbooks had of being slow and prone to heating, and ARM being seen as slow/exclusively for mobile. Apple wasn't the first to make a ARM computer, but from memory, a lot of them were relegated to either Chromebooks or Single-board computers. You'd be silly to put an ARM-based CPU in your laptop, if you were planning to do any serious work.

The whole agentic AI trend of late basically has people flocking to go for an M-Series Mac, even when the setup is mostly routed through an external provider, and could run with minute resources.

It's equally as weird to think that your Macbook runs on an iPad/iPhone chip, but there we are. If you went back 10 - 20 years, and told people that Apple were making Macbooks run on old iPhone chips, they'd think you were joking about how bad they were.