This is an interesting response and one I'm pondering myself. It clearly is of extreme importance to seed new developers in the industry and how should small shops shoulder their share?

Young/junior developers often have a lot of spirit and enthusiasm which is injected into an existing team. They'll also tend to bring the 'latest new ideas' which while not already ideal does get the old guard thinking. If anything it's interesting to watch people adjust their proverbial footing to stay relevant.

On a similar note, I often wonder how does a senior/lead developer take a different direction? I took the JVM + Web stack and I was giving it serious thought to jumping ship into another area of software development. Now understandably you wouldn't be a lead but rather a born-again junior yet any interviewer will automatically assume (with evidence to the direct contrary) you've been doing it for years.

Tricky our industry...