To change this logic, I think we need to change mass culture. Simply being more mature in the way you talk about, is nice, but it also means you can't participate on an even playing ground (again, en masse)
I think the only dirty secret when it comes to passing 40 as a software developer is that you become more and more in the minority and notice that there is a greater percentage of older people looking for work. So- it's a little scary.
Younger people I've known are typically headstrong in the ignorant way of youth - they can't help it, they don't know what they don't know. I haven't seen young people pay particular attention to what older people say.
But young people aren't usually very interesting, so not being culturally relevant to them doesn't really affect me in any way.