This looks like the most rational answer by far. I know several very experienced developers treading water in contemporary software environments, feeling frustrated as they're surrounded by bearded dudes who think they know it all but won't listen to the people who INVENTED the systems they're using! It's worth noting, too, that the majority of these deprecated geniuses are women. (Computing used to be a job for the girls, in case the beardy guys missed that.) So advertise for older experts. Maybe even ask a few of them what would incite them to apply - and consider targeting women.