Here’s another important data point of another coin we can learn from: SiaCoin. They announced long ago that they had decided ASIC mining was better for security than GPU mining, for reasons that they explained at length in this blog post:
(I’m not entirely convinced by all of their reasons, but I certainly think there’s truth to at least some if not all of it.)
Since then, they launched their own custom mining hardware: https://blog.sia.tech/november-obelisk-update-4216c77a5356
After that, there was apparently a situation where Bitmain announced a miner for Siacoin and then the Siacoin devs wrote “If Bitmain takes any action to harm the Sia project, we will soft-fork to invalidate their hardware.”
I haven’t had time to follow the whole thing closely. Anybody know of current developments, more details, or errors in what I wrote here?