Local computing on devices or local servers and remote computing using communications to reach servers have in the past been partial product substitutes. That will be true for edge computing as well. In fact, for new classes of applications, edge computing will provide the same business value as content delivery networks have provided for cloud apps generally: better performance and lower wide area network charges.
As latency performance and cost savings on bandwidth were the reason content delivery networks have had value, so edge computing will allow a reduction of north-south traffic. That might be especially true for use cases involving huge amounts of raw data to be processed and requiring artificial intelligence including real-time use cases.
One development that could accentuate the tradeoffs is if apps could be streamed to devices as video and audio now are streamed. That would substitute remote servers and communications for local processing and storage on a device.
As always, the precise trade offs would depend on processing intensity and distance from the remote servers. Edge computing obviously would be helpful for processing intensive apps and use cases.
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