@streakmachine I’d check out Pharo [pharo.org] too. http://www.deepintopharo.com/ gets into some of its cool stuff.
I’m tempted to do Smalltalk for AoC next year. But not sure the autocomplete will match my expectations. Feeling burned by that with Mercury this year. I spend so much time fighting compiler errors - and they don’t even have column and range info, so it takes close reading, too.