Has anyone ever reconnected with a lost friend? How did it go?

Sometimes when I am lonely and working the night shift my mind starts to wander and I think of those friends I had... that I spent a lot of time with, and that we slowly drifted apart.

I remember one friend from high school, C, who we were never that close but we sort of always wound up in the same sports/clubs and ran into each other in university and we wound up going to the bars quite a bit. He was odd, probably thought I was odd, we were never close but we spent A LOT of time together. Slowly we just talked to each other less and less.

I also think of M, who I was quite close to in university. Lived in the same dorm, had many many meals together. Were in a band together. I had an extremely embarrassing birthday and we... just never talked again after that. I think we were both embarassed and didn't talk for a week... which turned to week(s) and then months and years. Just sort of strange to spend so much time together and then nothing.

So... just out of curiosity... did anyone reconnect with an old friend? How did it go? I've thought about reaching out but... idk... you sort of say "what's up?" exchange pleasantries and then it dies when there isn't much to talk about.