That’s mainly restricted to graphics cards. Audio cards like used for production as well as I/O (USB, etc) and networking cards have drivers and work fine given

That’s mainly restricted to graphics cards. Audio cards like used for production as well as I/O (USB, etc) and networking cards have drivers and work fine given you have a PCI-E slot to plug them into, and of course almost anything external connected via USB or Thunderbolt works fine. For GPUs, it’s only a specific subset of users that needs a discrete GPU, especially as the GPU built into M-series SoCs has become powerful enough for most uses outside of high-end gaming.