Loneliness, no. Catharsis, yes, currently.
In the past it was research, (when I started here over 9 years ago), and support. I was off the forum for several years between 2009 and late 2013 or so, and had little need for this type of exchange during that period. About two years ago certain life changes forced me to express my thoughts with respect to relationships with JWs, as I was deeply hurt by an old JW friend "just following orders" that decided to shun me. That experience taught me empathy however, and I try to offer such to those far less fortunate than myself, with respect to being an ex-JW, which is another reason I continue to contribute here.
I have a wonderful family, a good education and career, and a good second lease on life overall. Nothing to be lonely about.