[fredemmott]

> my ask is to just make a better language and drop ALL of PHP baggage.

Long-term, we hope to make pure-hack projects more practical, and we're aiming to make Hack the best web development language. This will take time - both to decide what parts of PHP we want to keep (it definitely does have excellent parts), and how we want to change the things we think need improvement.

> Because why even break support from PHP7 if you don't plan to change (fix) the builtins?

Sorry, I was unclear: changing the behavior of the PHP builtins will break BC with PHP, and the result would still not be what we want for hack. We're likely to build Hack-only replacements for the PHP builtins, instead of changing the behavior of them.