Somewhat off-topic, but the following article might be interesting for some of you. It gives an overview of high frequency trading firm Jane Street, including the importance of OCaml in its success.

https://frontmonth.substack.com/p/jane-street-and-the-arbitrage-royal

On Tuesday, 8 November 2022 at 17:45:40 UTC, jmh530 wrote:

Imagine if they knew D ☀️

On Tuesday, 8 November 2022 at 17:54:43 UTC, Imperatorn wrote:

Nice article. Thank you. Btw they have a great podcast https://signalsandthreads.com/ - there are also many interesting things from JS members.
Jane Street is well known trading firm. But I think we have here chicken-egg problem) "importance of OCaml in its success".. or their success is important for the OCaml ecosystem? :)
The idea about choosing such language is not new. Paul Graham with his posts about Lisp even mentioned in the article. But first of all there are should be people, who will be smarter than others.

And now you found out what is Symmetry :) But I think D is not a big deal in that specific case of Jane Street.. And probably that's why Symmetry is making SIL. The idea of OCaml for Jane Street is type system. D just doesn't have this "feature".