Router vendors start saving DHCP lease tables to stable storage and the issue is fixed?

> What happens on a technical level when every device behaves like that?

We start putting battery backup in routers so they won't drop their DHCP tables? This isn't asshole mode, it's "assume the network is functioning properly and hasn't been reset" mode. In the world of portable devices, it's important to look at where we waste time and compensating for errors is a frequent culprit.