This can be a positive. My experience with 40+ year olds is that they tend to sacrifice user experience/security for what they know. "Our customers won't care if they have to use Internet Explorer with ActiveX as long as it gets the job done." My point is that an experienced programmer who is not up to date can be as detrimental an arrogant 20 year old. The 40+ year old programmer who stay up to date though... They are worth their weight in gold and I aspire to join them one day.
Edit: Background - Got really pissed off at a 40+ dev using active x to launch external programs and making it a requirement that our end users use IE with ActiveX enabled. Almost lost my job because management sided with the person who had more experience.