The cloud promised that location no longer mattered. Physics disagreed. Every request to a faraway datacenter pays a tax in milliseconds, and for a growing class of applications that tax is the difference between magic and mediocre. So compute is moving back out — to the edge.
Why distance matters
Light is fast, but not infinitely so. A round-trip across a continent costs tens of milliseconds before your code does anything. The edge collapses that distance by running your logic in hundreds of locations, a few miles from the user.
The new topology
The modern stack is a gradient, not a place: device, edge, region, core. Work runs at the shallowest layer that can handle it, and only reaches deeper when it must.
What runs at the edge
- Personalisation and A/B logic, per request
- Auth, routing and rate-limiting
- Small-model inference close to the user
- Caching that understands your data, not just URLs
The centralized cloud isn't going anywhere — it's still where the heavy, stateful work lives. But increasingly it's the last stop, not the first.