As a very heavy user of spec, I’ve since switched to using Malli [0], which is similar but uses plain data to model specs (and doesn’t use Clojure Spec at all).

Also, Malli is being funded / supported by Clojurists Together [1], which is a wonderful initiative that’s also worth a look.

[0]: https://github.com/metosin/malli

[1]: https://www.clojuriststogether.org/news/q3-2020-funding-anno...