It isn't a "bit of a joke" when the graphics teams behind normal desktop apps and browsers put more work into making sure the thing works on Intel than they have for AMD and Nvidia. They know what the majority of users use.
Nobody cares if Nvidia sells lots of DGPUs if ye average Fortune 500 company isn't deploying devices with DGPUs in them and the app they're paying a million dollars a year for suddenly breaks on Intel.
People need to remember that there is an entire world of computing outside of datacenters and high performance desktops.
Yes, technically they make many by volume. But they are very limited integrated GPUs. Fine for basic encoding/decoding operations, not really practical outside of browsing and e-mail checking.
AMD has been doing fantastic in the mobile and console space, I admit that. Their products are decently energy efficient and powerful for what they are. But they're struggling to keep up with the leading edge and their market share is tanking because of it.
Nvidia has a 92% market share in the discrete GPU market, with AMD holding 8% and Intel 0%.
That is not a healthy spread.