[boyswan]

Since moving from javascript to reason/ocaml, i'm genuinely nervous about refactoring Js now. Helpful compiler errors are literally life changing, and being able to handle options with Some/None means no more nasty undefined bugs.

You can do a lot of funky things with javascript, and it's easy to convince yourself that because you can do it, you should do it. With reason I've found I can achieve pretty much anything with a far more concise set of tools, and I can't hack my way around problems - I'm forced to deal with them the correct way.

Being forced to do things in a certain way has a massive benefit, and encourages consistency. You can look at 5 different javascript projects and each one of them will most likely be completely different.