Responsive Design allows us to create flexible user interfaces that support the widest possible audience with a single front-end codebase. But in embracing the ever-increasing contexts in which our sites are used, performance and accessibility must remain our highest priorities; we must continually question each code addition, and improve our delivery and application techniques to ensure they’re best serving users’ needs. More info at: https://fronteers.nl/congres/2015/sessions/delivering-responsibly-scott-jehl