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Agreed, more or less. Brainfuck implementations are not generally interesting, except as proofs of Turing-completeness for other esoteric languages. And there are many more esolangs out there with much wilder and more beautiful semantics than Brainfuck. Implementing those can be a really valuable learning experience.

Also, if we’re bringing Scala into it, I would be more interested to see a type-level implementation.

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> And there are many more esolangs out there with much wilder and more beautiful semantics than Brainfuck. Implementing those can be a really valuable learning experience.

Like, for example, INTERCAL with threading via `comefrom`: http://www.cse.unsw.edu.au/~malcolmr/intercal/threaded.html

Lazy K[1] and Funciton[2] are two of my personal favourites.

[1]: http://homepages.cwi.nl/~tromp/cl/lazy-k.html

[2]: http://esolangs.org/wiki/Funciton

If we're bringing Scala into it, I'd like to see a Scala compiler in Brainfuck. That might keep the esolang people quiet for a bit :)

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