From what I have learnt - Ken wants a perfect product and won't budge one bit on his thinking.
This could all still be OK depending on the timeline, but it does not fill you with confidence when Ken states he has no clue on the dates. (However probably a lie)
It's possible that Ken has seen the dawn glow of "Industrial scale" mining, by big boys with deep pockets.... the difference between the Black and Decker hand drills everyone else is making and a production robotic drilling station.... therefore is characterising "our" machines to fit this exploding niche.
If 500TH/sec chips are B&D hand drills, the 16TH/sec chip that ken has promised is...

It also pays to remember the growing difficulty. A B&D hand drill delivered today is as effective as the all-pro CNC delivered tomorrow.
I wish we had 16TH/s chips
I think you mean 500GH/s and 16GH/s
But your point remains. Our efficiency to deploy is diminishing every single day. Soon we are going to look like the dickhead who thinks he can 'build the biggest bitcoin mine in the world' by only using USB miners while the rest of the world is pushing out chips hundreds of times as fast as ours....