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US targets TP-Link with a potential ban on the Chinese routers
(www.theverge.com)
This is a most excellent place for technology news and articles.
Signed firmware doesn't cost anything, so I'm not sure what you mean by "keep the poors out." Signed firmware has a very valid use case for preventing supply chain attacks. The only time I have an issue with it if there's no way to make your own signed package or bypass the requirement.
It costs the ability to flash your own firmware.
That's 100% of all signed firmware implementations.