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There was a thread about Franz Lisp founder where he explains that DARPA D.A.R.T project was done in C, about 30M LoC, and failed hard, while the Lisp implementation was running nicely, easy to fix in hours not days.

I'm not an experienced lisper, but it's not the first time I read this kind of report.

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That sounds interesting! Google doesn't find any mention of that, only https://en.wikipedia.org/wiki/Dynamic_Analysis_and_Replannin... that says DART, far from failing hard, was a huge success. Do you have a link to the thread?

here https://news.ycombinator.com/item?id=31044510

btw, I, too, couldn't find traces of the lisp side of this project after a 15 minute search. I was curious about the fix times and lisp codebase size

Thanks! Right, so the successful version was the one written in Lisp. Okay, that's actually understandable. At that time, managed languages were not widely used, and C is really not a good choice for that kind of project. If those are the two options, I can certainly see how Lisp would do better.

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