> Many ISP and other organizations had provisioned the size of the memory for their router TCAMs for a limit of 512K route entries, and some older routers suffered memory overflows that caused their CPUs to crash.

> Engineers and network administrators scrambled to apply emergency firmware patches to set it to a new upper limit. In many cases, that upper limit was 768k entries.

Is there some technical reason for the emergency patch not to have increased the limit to a much higher and future-proof threshold?

In 2014 it shouldn't have been hard to predict that the new 768k would have been hit in just a few years.