First, I like to see what language-feature(ish) boxes it ticks. I like to see something that excites me :P Actor model? Type-classes? Algebraic data-types? Imm

First, I like to see what language-feature(ish) boxes it ticks. I like to see something that excites me :P Actor model? Type-classes? Algebraic data-types? Immutability by default? Type-level programming? Second, what is the tool support? Do I get an IDE? A languace server? A config for vim/emacs? At least syntax-highlighting? How do the error messages look like? Compiler? Testing frameworks? Lint? Third, I like to evaluate practicality. Can I imagine maintaining a cli app in this? A web server? Would I be able to connect to databases? Easily serialize data-structures?