I think 80 chars should be enough, anything longer will attract unnecessary considerations.

Are "unnecessary considerations" really a problem?

Is title length a cause (not even the cause, just a cause) ?

"shorten title" is invalid consideration for title change as it doesn't suggest the replacement title

It also just so happens to be not a traditionally good or valid or accepted reason to consider a title change

Changing the rules for titles after two decades of perlmonks cause one 10 year old doesn't know how consideration should work?

So, to fix an imaginary problem the solution is to fix the imaginary cause?

I think no