I have a Linux laptop and an eGPU. I dual boot Windows when I need to use it. I didn't even try to get it to work on Linux because that's a good way to lose a week and gain nothing. Switching between dedicated GPUs and integrated ones is still barely functional after heavy tweaking, and laptops have been doing that for I don't even know how long.

That xkcd is extra painful because there are still, 11 years later, zero Linux browsers that support hardware-accelerated (i.e. smooth) video playback.