Yes for me communities has made it easier to find new content/people. I don't visit the ocd or gems community very much, but lately as my interest are shifting for winter I spend a little time over at the StemGeeks community, come spring it will be the garden communities. They provide a much cleaner set of post than searching via tags ever did for me.
Too many uses for some could be a problem I guess, but I kind of like having this huge library of resources available, I may never use much of it, and we need a Dewey decimal system in place that works to find things, but sometimes the hunt is fun.