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Open source router firmware project OpenWrt ships its own entirely repairable hardware
(www.theregister.com)
This is a most excellent place for technology news and articles.
Less about open source, more of just a practical stance. The thing about networking is that standards change all the time, and it’s better to have a single device serve a single role on the network than to cram all those functions into a combo box.
So an ideal network has a separate router, switch, and access point. Ideally two of each in redundant configurations but that’s not required for most people.