[reikonomusha]

You asked where Lisp is useful, and I supplied a list of companies that find (or, in some cases of recent history, found) Lisp useful. Your Google example is pertinent, because Google had the resources to wholesale eliminate its use of Lisp any time within the last 15 years, but for some reason worth pondering, hasn't. Instead, they continue to develop the product in Lisp, and continue to contribute to the Common Lisp open-source ecosystem.

But that aside, if you want a fresh look at what people are thinking about with Lisp, maybe check out the talks that were given this year at the 2025 European Lisp Symposium [1,2]. Or perhaps look at how someone shipped a platformer game on Steam with Common Lisp [3,4], and is in the finishing lap porting it to the Nintendo Switch [5].

I realize, though, that this kind of "debate" (?) is never satisfying to the instigator. If it does satisfy though, I will agree with you that—despite all of the claims of alleged productivity and power the language offers—Common Lisp remains far less popular than Python, which I assume is your only real point here.

[1] A presentation about how adding a static type system to Common Lisp à la Haskell helps write mission critical programs in defense and quantum computing: https://youtu.be/of92m4XNgrM

[2] A talk from employees of Keepit, a company that supplies a SaaS backup service, discussed how they train people on Common Lisp when employing them: https://youtu.be/UCxy1tvsjMs?t=66m51s

[3] Discusses technical details of how Lisp was used to implement a game that was actually shipped: https://reader.tymoon.eu/article/413

[4] The actual game that you can buy: https://store.steampowered.com/app/1261430/Kandria/ (This is not intended to be an advertisement and I'm unaffiliated. It's just a demonstration of a recently "shipped" product written in Common Lisp where you might not expect it.)

[5] Technical discussion of the Nintendo Switch port: https://youtu.be/kiMmo0yWGKI?t=113m20s