The Importance of a Class-Venture Profile in Haskell

It's not the stack trace you would naively expect if you're not used to laziness yet by looking from the source code. Is that a good thing or a bad thing? Sometimes I think there's going to be cases where you just need the class-ventor profile, especially when it comes to things like tail calls. And thankfully now we also have really great tools in the cost center profile, which really complement that need, or address that need quite well.