Isolation has the connotation of a single thing or individual being... Isolated from the group. Atomization is meant to evoke a sense of the more widespread impact on society. After all, if something only impacts a small subset it's considered... "Isolated"
That being said, atomization is definitely not a new term to describe this...
Personally I am living for the next time I hang out with one of my "friends". I don't really know them all that well, but they seem interested in getting together and playing factorio with me. Just remember you don't have to have long term, grand reasons for sticking around.