[henriks]

I guess your perspective on these "gotchas or expectations" changes depending on how invested you are in the language. I worked on an Elm project that ended up fairly large. We started at 0.14, and each version upgrade became progressively more difficult because of changes made to the language and to the runtime. Some of the changes were understandable, such as wanting to change the direction of the platform by dropping FRP, while others were not, such as disallowing inline operators, or dropping methods from the standard library just because the BDFL decided he'd prefer for people to do things differently.

What really ended up bugging me was the patronizing "we're doing this for your own good" response given to every reasoned attempt to question these choices. In the end, Elm definitely had lots of excellent ideas, but I'm happy I don't need to deal with it any longer.