The main reason I stopped using lisp was because of the community. There were some amazing people that helped out with a lot of the stuff I was building, but not a critical mass of them and things just kind of stagnated. Then it seemed like for every project I poured my soul into, someone would write a one-off copy of it "just because" instead of contributing. It's definitely a culture of lone-wolf programmers.
CL is a decent language with some really good implementations, and everywhere I go I miss the macros. I definitely want to pick it up again sometime, but probably will just let the async stuff I used to work on rest in peace.