I agree that dune is worse in many important ways than the build systems of languages like Rust and Go (where they were developed at the same time as the language, rather than 20 years later). But dune config files aren't lisp. They're s-expressions, which have the same syntax as lisp but are just static data like json/yaml/toml (and once you get used to them, I think most people prefer them to those).
It's fine to trade when you know something that the general public doesn't. Indeed that's really the only time you should trade: you presumably want to make a profit, and society wants relevant information to be incorporated into prices. The thing that's not fine is trading on secret information that belongs to someone else. Insider trading is about theft, not fairness. https://www.bloomberg.com/opinion/articles/2015-04-01/anothe...
You can get those cool features in languages such as OCaml/F#/Scala/Haskell, and then you don't have to worry about managing memory because you have a GC.
From the point of view of somehow that has taught C++ as TA, worked with C and C++ during several years in some heavy contexts, an afternoon won't do it.
Me neither! I at first thought "hey, that's cool", but then I realized that the replies would also have to be in the code, and then it's no longer as appealing to me. And what do you do if you want to have a back and forth discussion? Take it "offline"?
It's interesting that they have a much higher valuation (and from some cursory research, moderately more users) than Depop, despite (AFAIK) being completely obscure in the US/UK.