He thinks he can get to 100k TPS.
What's the problem with doing 100k TPS on the main chain?
(other than non-answers like "it's hard to do")
I said what on the thread that you trimmed

security...
I really dont think you want that on the main chain because its weaker, and he cut down a lot of bitcoin features to get it. But its useful.
I am talking about the specific sharding approach. Its not easy sharding a block chain, and he made security tradeoffs to do it.
Nothing against someone doing it if they can do it securely (ie without impacting the security of the rest of the coins on the chain) or without making the centralisation very bad.
Adam