I was experimenting with Elm around .14 or .15 if I remember correctly. At the moment the language allowed you to use prime(‘) to name variables, and that was the suggested way if I had to guess by the tutorials and examples.

During next release they decided that primes as part of a name were not their cup of tea and removed it. Just like that. When I asked why was prime no longer allowed, since I couldn’t see any good reason behind it, I got the usual: “it’s pre-1 release you should expect things to change, etc.”

What left a bitter taste in my mouth was that this change had nothing to do with the language itself. It seemed as if they decided that using prime is not good style, so they forbid it.

I haven’t touched Elm since.