Parser combinators are great ie. in TypeScript [0].

Combinators in general are concise and practical ie. runtime type assertions [1] or generators [2] etc.

We use them in several places in production.

[0] https://github.com/preludejs/parser

[1] https://github.com/appliedblockchain/assert-combinators

[2] https://github.com/preludejs/generator/tree/master/src