[sciolistse]

It's been "the same javascript everywhere" mostly due to the ECMAScript group kinda stalling for the past 15 years. The stabilisation created through that has been useful, but the plan is to transition the spec onto a one-year update cycle.

That means that going forward we'll likely have more feature mismatch between engines, making backward compatibility compilers pretty important.

I'm not entirely sure if that's good or not.