[sheepmullet]

> using Clojure for large projects and the feeling of how _maintainable_ that project will be in 2-3 years or longer

Maintainable in what sense? And large in what sense?

I typically work on 1-10 million lines of Java code solutions split up into maybe 20-50 seperate components.

These 20-50 seperate components have untyped boundaries between them.

Setup correctly these untyped application boundaries rarely cause problems - of course you have to put a bit more thought into architecture, documentation, and verification but it’s not particularly onerous and we have been doing it successfully for decades now.

I’d say anecdotally errors caused by this lack of typing are well under 1% of total errors.