Everything changes, nothing is forever. It's a hard truth, but the more capable you are of accepting and rolling with it, the better your life will be. I've heard it said that the tagline for the theory of evolution should really be "survival of the most adaptable" , and I think that applies at every level, from the species, to the culture, to the subculture, to the family, and finally, the individual.
If the internet you knew and loved is gone, mourn it, move on, find a new thing to love. Or create it.
If the internet you knew and loved is gone, mourn it, move on, find a new thing to love. Or create it.