[srehnborg]

I think one advantage that you bring to the table in the expertise field is you have much more experience that you can leverage than a younger person. While you might not be a true expert in that one field, having a more exposure from years of experience gives you the ability to bring other knowledge to the table and apply it to your expert field.

[celljunk-e]

I have seen this as I have a lot of work experience, but limited dev chops relatively speaking. I find myself being able to solve problems, but implementation is slower than I'd like it to be.