I've got three separate applications all "close to finished" and I've been working on them for years (along with many other things).

Just as I'm getting real close to being finished enough to release - something changes - life changes - or some other thing changes - or I don't believe in the product any more - then I do believe in the product again - then blah blah blah. Always "legitimate" reasons - outcome always the same - haven't shipped anything in years except a bunch of open source projects.