When I was at school and my peers made fun of me for my even slightly esoteric interests I felt alone. I didn't know anyone else who liked the same things that I did; or at least not to the same, occasionally obsessive, degree. It was hard.
Now that the internet exists and is popular: I can find my people. There's probably a forum or subreddit for pretty much any niche I could care to infatuate myself with, and there's creators on YouTube making fantastically long and detailed videos on the minutiae of every subject under the sun.
I don't feel alone any more :)