[kbp]

You're mixing your "playing by JS' rules" point with just general Elm features. Faster compilation speed, faster executables, and smaller executables are not JS' rules, they're just generally desirable things to have. "Faster than Webpack" and "no runtime exceptions" are certainly not the JS world's rules (does Purescript have runtime exceptions?). That a typical JS developer can get up to speed quicker in Elm seems very nebulous to me; why? Could you elaborate more on what you're talking about? How is Purescript not playing by JS rules, other than being (I assume) slower than Elm?