The mind loves to invent time regret in hindsight: "I should have cleaned the house instead of watching TV", "I should have spent more time with my kids instead of spending so much time at my job", things like that. Is that what you mean?
I'm on the train right now, I probably spent five minutes phrasing this comment (and if it feels like five it was likely ten) meanwhile I had a book I was going to try and finish and instead I squandered the ride on Internet junk food.
So to answer your question: yes, but no.
-- William S. Burroughs, "The Western Lands"
I could wander around town and strike up conversations with strangers and years would pass before I found somebody with the specific set of interests. But there in the depths I can find somebody else who is actually looking to talk about the same niche thing.
I don't know if friends is the right word, I only rarely meet them again later. But for a brief time we were a some kind of partner.