I actually take exception to your statement about Enfocus being 'bad' about our dates, I'm not quite sure what your expectation is. I actually think Enfocus is pretty good, the Mavericks release was soon after Apple released and any customers who talked to support immediately got the option of a beta version to try which also helped us with our QA testing
We always try to release as close to the release of a new Apple OS as possible, and yes we get developer versions, but they change overtime and Apple very often change the 'golden master'. So we have a policy of waiting until release and then testing with the version that Apple ships, the one our customers use. That's the only way we can be sure.
I would love to say when we will be OSX 10.10 compliant, but I don't know when OSX 10.10 will ship.
I'm not going to apologise for waiting and making sure that we deliver a quality product that works correctly on a new operating system. Too many people use PitStop in their daily business for us not to.
Back to the question, why jump on OSX10.10 early. Unless you are buying a new Mac is there any good reason to jump straight on it and put your production system at risk?