It’s a mix - I guess depending on the GPU driver. I’ve had shaders that won’t work on different machines with the same GPU (yes, Mac often!), and IIRC the same machine and GPU with different drivers, but also the same OS / machine with different GPU’s - eg. Intel stricter than nVidia on laptop with PRIME.
Thanks for that link - literally looking into hints now, as I’m updating some missing hint mapping in PraxisLIVE!