Plenty of ways to define complex data shapes in Clojure

Spec is definitely underrated here considering it's built into the language and has a wider scope but for most people they want the intellisense experience which you can get with clj-kondo + mailli but is not built in so most teams don't use it, fair enough

I'd like to move the goal posts though and say I want flowstorm in every (any other?!) language

I can just run the program and scrub backwards and forwards through the execution and look at all the immutable values frame by frame with a high level UI with plenty of search/autocomplete options

For program understanding there's nothing better

The fact I can program against the timeline of values of my program and create custom UI on top is crazy

One of the most mind blowing demos to me was Bret Victor's inventing on principle and having a programmable reverse debugger for your language makes those demos viable

I built an emulator recently for work that replays what happens on live locally, combined with flowstorm I can go line by line and tell you exactly what happened and why, no print statements no reruns with my own custom UI customised to our apps interesting parts

This is my appeal to anyone outside of Clojure please build flowstorm for JavaScript and or Python

The design of flowstorm is definitely helped by the fact that 95% of Clojure programs are immutable but I don't think it's impossible to replicate just very difficult

This indeed is one of the superpowers. I hope Elixir will eventually acquire it.