Lets say we all take the red pill and jump into "Everlasting lock-in hell" (as another user put it).
Once you pull the trigger, there is no going back. Projects you make are locked to it, and you have to keep your subscription current to maintain them.
So what is the roadmap for C3? We have seen evolutionary niceties that I would think any program of this age would have, but what of the future? Why upgrade?
All of the years of feature wishes from users seem to be met with 'why you don't need that feature' or 'we aren't going in that direction' or 'you can always write your own plugin'. Construct2 users are as loyal as Star Wars fans, and are so hungry for C3 they politely cheer with each new blog post. But like the release of Episode 1, it eventually sinks in that Jar-Jar just isn't cool.
Since purchasing C2, I've never thought of looking at any other programs until C3 was announced. I think the other offerings have leapfrogged scirra and are focused on revolutionary tools to make it easier for the user to efficiently create quality games across a wide platform. C3 seems very focused on what was C2s future 10 years ago.