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From Flash to React, a survivor's field notes

Lessons from two decades of technology upheaval, and what the next decade will demand.

AJ Barnett·January 2026·10 min

I've watched Flash die, jQuery peak, Backbone rise, Angular pivot, React arrive, TypeScript conquer, and AI arrive on the doorstep. The framework changes. The mindset doesn't.

The cycles

Every cycle promises to replace what came before. Very few actually do. Most inherit the same problems, state, layout, motion, accessibility, and re-express them in new syntax.

The constants

Curiosity. Ownership. Communication. The engineers who thrive across cycles are the ones who invest in these three, and treat the framework of the moment as a rental.

What's next

AI-assisted engineering is not the next framework. It's the next layer of the loop, a peer, a co-author, a reviewer. Treat it as engineering practice, not as magic.

Written by

AJ Barnett

Frontend architect, design systems engineer, AI practitioner. Twenty-five years of shipping.