The internet runs on light — until it matters. Data crosses oceans as photons, then stops at every router, switch, and server to become electricity: converted, processed, cooled, converted back. Billions of times a day, the fastest thing in the universe waits in line to become the slowest part of the network. That conversion tax is where the internet's cost, heat, and delay actually live. The tell is the buildout: record spending on fiber and data centers, yet congestion, energy strain, and latency complaints keep climbing. The industry is widening the highway while keeping the tollbooths.
Inside: why the conversion layer is the internet's real bottleneck; what the data center construction boom conceals about network economics; how networks that stay in light end-to-end restructure everything from the backbone to the last mile; and who is positioned to own the light-native internet.
This isn't a telecom forecast. It's an industry map for the internet's first true rebuild since the router — written for builders who want to see it before their industry does.
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