Ah, I see. Not sure why though - I understand its all OpenGL rendering now.
It may be that it no longer uses SIMD, or that a software rendering path is still lingering in the code? I don't know for sure, it could be that SIMD is being used for some other optimization as well. We'll find out once we get there :)
In other news, here is a video of HiFive1 boards on the assembly line: https://player.vimeo.com/video/195871404
There is still a chance to get founder's edition/early access boards, they increased the number of them being produced due to demand!