I'm in my 40s, and I build software at a scale-up.

They explicitly searched more mature developers, because of several failed projects with large over spending the past years. Management had enough of it, and now wants a more experienced dev team.

And it works quit well I must say, code quality is very high and we make our deadlines. Our product is stable and atmosphere in the office is great actually. Not much stress here, because we don't spend months building some never to be used generic-multipurpose-framework and we don't jump into every new technology which comes around..

Not hiring experienced developers is a big mistake! :)