Mining will be unprofitable if we achieve that technical design goal. Only users that send transactions or who don't count their insignificant electricity cost will mine.
Did you just reveal that mining has a proof of burn involved because I don't see any other way for that statement to work otherwise.
I already told you that if users are required send PoW with each transaction and they don't care about their insignificant electrical cost then PoW will be unprofitable, especially if the CPU-only hash has been well designed to be within an order-of-magnitude of the potential ASIC optimization. In my recent archives (July?), smooth and I estimated this order-of-magnitude for Cryptonite at between 1 and 2, and I believe mine may be slightly better than Cryptonite.
There is your first example of me doing something technical you formerly thought is impossible. And there will be many more such cases. Stay tuned...
Oh, you're using PoW for what it was actually created for...who would have guessed haha.