[old guy writing a zombie movie] I should write a part where they need the old guy real bad

That the elder was indispensable in precisely this situation was an eventuality for which they had planned extensively, and would determine the fate of the survivors. Unfortunately, when they needed him most, he was away explaining physics to the bunnies having completely forgotten his part,

Doesn't he usually die in the most horrific way? Wait!! Make him the unlikely hero?

I was talking to someone about how in Berman era Star Trek there was this prevalence for outdated backwater boomer allegory to come in and save the day for the Gen X allegories who were too stupid to put their technology down and do things "the old way."

Same energy

Why yes, you should. But that would cut into nap time.....

"The only phone we can use to call for help is this old rotary phone! We're doomed unless someone knows how to use it!"

Old guy still has paper maps/atlas and knows how to read them and the internet and cell phone network no longer work

All the chicks dig him.

wow it turns out listening to steely dan is the only way to cure the infection

Or a young guy who has the attitude of an old man and a flip phone