Never too old and if anyone says it is just ignore them, not their life to dictate. I will never understand why anyone would give up what they find fun because someone else finds it silly or 'not socially acceptable'. Its just them trying to press their own opinions of whats acceptable like its a fact.
I'll never stop gaming, if someone didn't like that to the point they judge me or try and tell me to stop its not a person I'd care to be friends with or talk to anyways. I'm not that old but when I was younger I got berated all the time for gaming, very glad I ignored all that nonsense and kept doing what I enjoyed. I've got a good career path out of it and friends I met online through gaming who now live close by.
I remember those, one of the few times in my gaming lifetime I was willing to help and join random parties of randoms was to get those Vidmaster challenges done with them.