It happens, but outside of the really big projects, it usually seems like there's one or two people doing all the maintenance. The more technical the project (e

It happens, but outside of the really big projects, it usually seems like there's one or two people doing all the maintenance. The more technical the project (e.g. algorithms, image codecs) the worse the problem is. I was fortunate enough once that a big company used an algo I wrote and contributed a performance improvement in an area I'd had writers block on, but that was the exception.