Intel on the other hand typically has their drivers in released kernels long before their hardware is released. Intel's New GPUs haven't been released yet, but they first started adding support in early 2019 [2]. I can't find it now, but I remember hearing a story about Intel removing drivers from the kernel tree for some hardware that they cancelled.
If you want to use a modern high-end GPU in Linux, your only real choice continues to be Nvidia. Their drivers are not open source, but at least they work at launch (except maybe with a 5.9 kernel?).
This is why Intel entering into the high-end GPU space is so exciting. Soon we may have a high-end option with good open source drivers while the part is still high-end.
[1] https://www.phoronix.com/scan.php?page=news_item&px=Linux-5....
[2] https://www.forbes.com/sites/jasonevangelho/2019/02/18/intel...