Yes, it runs in the kernel on Plan 9. And sure, these days there's various optimzation using shared memory for a lot of the gfx or going via OpenGL when using

Yes, it runs in the kernel on Plan 9. And sure, these days there's various optimzation using shared memory for a lot of the gfx or going via OpenGL when using X11. I'm just saying unixes have done it a similar way to Plan 9 since almost forever - and it's not that big of a deal.