It's probably not GitHub as such, but the associated memories and experiences. You never miss a place, you miss the feeling of happines you had when you were th

It's probably not GitHub as such, but the associated memories and experiences. You never miss a place, you miss the feeling of happines you had when you were there, or the people you spent time with there. People get emotional over a car, over a house, over a pet... you could argue for everything it's just a car/house/pet... you can get a new one.