Oh this was in the same tweet where he also said "twitter should have been a protocol". If only as founder of the company that developed the system he was in some position of authority to make that executive decision.

Coward. You decided to not do that. You were either a coward then for not standing up to your investors/board demanding that you do something different, or you're a coward now for not owning what was probably the correct business decision for twitter as a company.