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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.
There are use cases for this router, but please don't get the plastic clone sold by the same Chinese company that assembles the real thing. (The plastic clone costs a third, but doesn't have detachable antennas and doesn't accept mainstream OpenWRT because it uses an almost unknown CPU.)
Myself, when I need a high capability router (for me "capability" typically means "range") I turn towards a Raspberry Pi and Alfa AWUS1900 wireless card. Yes, it lacks in throughput (USB is a severe bottleneck)... but with a bit of tweaking, you can talk out to 2 kilometers if terrain allows. :)