[q3k]

The first two are a feature for me. Not to mention not being crippled by Xilinx 'IP Core' DRM.

[analognoise]

Crippled by extant, available code which is shipping in millions of devices?

Is it perfect? Hell no. But it's a bit drastic to throw out an entire catalog of the most battle-tested HDL code in the world, isn't it?