I don’t think the internet has helped with this. Back in t’olden days, if you were in your 40’s and you were obsessed with TS (or anyone really) you’d have to keep it to yourself for fear of being seen as a weirdo and it would, in most cases, just burn out. Now, you can always find somewhere on the internet with like minded people to egg you on (and that goes for any age tbh). Tumblr especially is a magnet for people with an obsession with a fandom. I always go back to the Outlander fans on there that I stumbled on after I’d watched the first season and they are literally INSANE and they’re mostly women in their 60’s-upwards.