It wouldn't be a huge issue if the user had control on when the reboot would occur. I mean, for many users it would be much better to have a reboot at 4AM say e

It wouldn't be a huge issue if the user had control on when the reboot would occur. I mean, for many users it would be much better to have a reboot at 4AM say every sunday morning than randomly and possibly in the middle of something important. An external timer power cycling the router at the desired moment before the 20th day can solve the problem as the counter would then restart, but it would have been trivial to implement it in software.