Practice · 2010–now · Cloud Scale
Mobile-first / Responsive
Design for the small screen first. Became table stakes, not a differentiator.
Why Mobile-first / Responsive stuck
Mobile-first stuck because traffic followed phones and CSS finally made responsive layouts cheap. It stopped being a fad when ignoring it meant losing customers. Now it is hygiene, not thought leadership.
Case studies

Compare with
Related
Framework · 2013–now
React
Components and unidirectional data. Won the front-end by being good enough and having a gravitational ecosystem.
Framework · 2011–now
Bootstrap
Opinionated CSS that made every site look like a startup for a while. Still the fastest path to a decent admin UI.
Framework · 2015–now
React Native
React components on native views. Share logic with web until platform differences ruin your sprint.