Question is can you manufacture your own ASIC using this open design for the cost of an average GPU rig?
It has still very high costs to entry for small miners. Developing strong ASIC resistant algos for GPUs is easier and more effective.
How so? Outside of a few specific instances you can buy an altcoin ASIC for WAY less then it costs to build a 6 card rig and get better performance. You can fight ASICs all you want, you wont stop them.