recursion-ninja

I'm willing to take a stab at this. If unsuccessful, I'll at least report the problematic pain points for a future contributor.

> Another one which I haven't considered is to expect that elements are reduced to NF. By enforcing `NFData` you mean `rnf`ing elements on write, correct? The `vector` package already...

@dcoutts, @Shimuuar; to to pile on to the bikes-hedding too much, but might I suggest `UnboxViaBoxed{Strictly,Lazily}` or `UnboxViaBoxing{Strictly,Lazily}` instead of `UnboxVia{Strict,Lazy}Boxed`. I think that they read equally clearly as English,...

@Shimuuar I like the names you suggested: * `newtype DoNotUnboxLazy a` * `newtype DoNotUnboxStrict a` * `newtype DoNotUnboxNF a` I'm updated the names in the PR tor reflect these, with...

Perhaps my reasoning is a bit naive, but if we were attempting to change the type signature of `unions` to no longer be list specific and instead be more generally...

Any update on a MacOS workaround? `"FT"` doesn't provide real time option prices, so there is a lot of value in getting the `"YAHOO"` data source working for MacOS.