My experience with older IT staff (and we have several at my employer) is they do not keep up their skill set
I'm in a similar situation to you, but I've always been proactive at keeping up my skill set. Due to my employer's belief that "keeping up a skill set" actually means courses on "how to spot phishing attempts" and "diversity training for all", I've invested heavily in time and my own money to set up a home networking environment that many an SME would be proud of.
Maybe I need to find some like-minded greybeards and set up a consultancy company.
Biting the hand that feeds IT
