Is your code easy to transfer to other environments? The Apple vendor lock-in is not a great place for development if the end product runs on servers, unlike using AMD Gpus which can be found on the backend. Same goes for games because most gamers either have an AMD or an Nvidia graphics card as playing on Mac is still rare, so priority should be supporting those platforms

Its probably awesome to use Metal and everything but the vendor lock-in sounds like an issue.

It has been easy. All modern GPU APIs are basically the same now unless you're relying on the most cutting edge features. I've found that converting between MSL, OpenGL (4.3+), and WebGPU to be trivial. Also, LLMs are pretty good at it on first pass.