Some people have an ISP that doesn't cache DHCP leases like to get a new IP every day and a reboot is a simple way to do that. Others have configuration issues that only show symptoms after the router has run for a while and don't want to fix the underlying issue and are happy to bandaid by just rebooting frequently.
Ahh, i get it.
The first one that is (dhcp), the second one seem to just be 'wrong'.
Why would you want a faulty system ???
But everybody is different i guess.
Thank's for the explanation...