The speaker expects a small number of successful tools to persist after a wave of rewrites into more effective languages, rather than continual rewrites of every tool.

“But then after you've done this iteration, and everything's running on this highly effective language, then you're not gonna be rewriting it all of the things every single time. There'll be a few winners.”

“A really classic one could be, say, Postgres is written in Haskell, which is a very unusual language, and it's very hard to maintain. Could it be re-written in Rust now? Yeah, probably it could.”