I have another Linksys "premium" home router ($200-300) but the WiFi died on that too, but it lives on as an OpenWRT home router but with WiFi disabled. The Apple WiFi routers also lived on for a while with WiFi disabled but acting as TimeMachine backups. Then the disks died and I couldn't be arsed to pry open the case with a hair drier to get at the disk inside and replace it. So for my home, the setup went from Apple all-in-one combo gear with routing, WiFi and backup disk, to specialized functions for WiFi (cheapest off the shelf), routing (openwrt), and backup disks (standard NAS hardware). (For TimeMachine.)
I hope my 15" Macbook lasts for a really long time, because when it's dead I don't know if Apple has any Macbook I want to have. But that's tomorrows sorrows..., no use worrying about that until the time comes. (I guess I can always fall back to Linux and some PC laptop.)