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Creating complex object graphs is also not trivial in Haskell, yet that language seems to do fine with real-world problems.

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Is it doing fine? There's lots of "cool" stuff, but in my perception it's still a long shot to "fine with real-world problems".

What's a complex real-world program written in Haskell? It seems to be good for trees (compilers like GHC, although it is kind of slow). Is there a non-toy graphics or graph-ical application that is both performant and written in Haskell?

Not denying that it's possible to write C-style in it, of course... only it's not fun.

At my previous company we used Haskell for a very complex, edge-case ridden, algorithm heavy path finding and pricing backend.

For other uses, [0].

[0] https://wiki.haskell.org/Haskell_in_industry

Of course it would be nice to have examples that we can actually look at. Also that webpage is known to mostly not point to easy to find information.

Haskell is also garbage-collected, and lazily evaluated to boot. It's not really an apples-to-apples comparison.

Of course not. Haskell is a purely functional language and Rust is an imperative systems language. It can hardly be more Apples to Oranges.

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