There's nothing wrong with that per se, especially for a company.
I'm only referring to hireability in new roles. If someone is staying in such a role that entire time, especially if their niche hasn't evolved such that it indicates refreshing tech skills from time to time, they shouldn't be surprised if the rest of the world has moved on from where they've stayed.
Someone could be working on instant messaging or a/v conferencing for the past 30 years. Or anything in sales and advertising. Etc.