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Future-Proofing for Security

I'd add that this issue of processing power has also come up outside of the realm of security, especially in the area of IP desk phones, which will likely need firmware upgrades either to move from proprietary protocols to SIP, or to add SIP feature/functionality as more features get standardized.

Dustin concludes with the pessimistic but also highly realistic evaluation:

Device replacement results in additional sales and profits for the vendor, so don't expect properly resilient hardware devices anytime soon...