I will be forever grateful for Hack spurring some huge improvements in PHP from the 5 to the 7 branch when they were pretty compatible with each other. I just

I will be forever grateful for Hack spurring some huge improvements in PHP from the 5 to the 7 branch when they were pretty compatible with each other. I just don't see a reason to follow them on this journey since they decided not to be compatible with PHP back in 3.3.