Just Friday I was dealing with a request from purchasing asking if a laptop with an ultra-low-power 15W TDP CPU and an iGPU with "8GB DDR4 graphics memory (shared) was a suitable replacement for one with a 75W CPU (But also a Core i9) and NVidia RTX4000 mobile 130W GPU in one of our lead engineer's CAD workstations.

No, those are not the same. There's a reason one's the size of a pizza box and costs $5k and the other's the size of an iPad and costs $700.

And yes, I much prefer to build tower workstations with proper thermals and full-sized GPUs, that's the main machine at their desk, but sometimes they need a device they can take with them.