[eyelidlessness]

> implementing it on a massive scale front-end application just seems impractical.

I was using Clojure/ClojureScript around the same time. I’ve since worked primarily in TypeScript/JavaScript. I’m sure the FP experience influenced my opinion, but it seems impractical to me not to use FP techniques for a large scale frontend application. The applications I inherited and maintain now, which were certainly not originally implemented with FP techniques, have been gradually becoming much more maintainable as I’m able to eliminate or at least ruthlessly isolate mutations. Not only because the code itself is easier to reason about, but also because it’s easier to reason about dependencies between different parts of the systems—even parts which haven’t changed.