[JohnFen]

> That said, it's important to have employees of all ages.

Yes, I agree wholeheartedly.

Experience is essential, as you point out. Experience is what lets you know well in advance what is likely to work and what isn't, what the most fruitful and harmful approaches are, and so forth.

Inexperience has its virtues as well. Experience (particularly recognizing and avoiding errors before they're made) is not 100% effective, and can sometimes make you discount an innovative approach that is valuable. Inexperienced people, by virtue of a lack of preconceptions, can sometimes come up with obviously impossible or impractical solutions that, in the end, aren't either of those things.

If a workforce has a diverse set of people, including diversity of experience, that makes the workforce stronger.