Having followed software-defined wide area networks for more than a decade, it still somewhat amazes me that the market gets the attention it does from the service provider portion of the connectivity industry. For starters, it never has generated all that much revenue for service providers.
Most of the revenue is earned by appliance and infrastructure suppliers that allow enterprises to create capabilities at the edge of the network. It long has been expected that sales would shift to service provider offerings, but that continues to happen at a shower pace than many would have expected.
Any product representing low single digit billions worth of revenue on a global basis, and even less for service providers, is a small market.
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