Uhh.. You miss the point entirely, if they make deadlines/set schedules and still can't meet them or stick to them after 12 years, then there's a clear issue with how they're managed. From a backer/investor point of view that looks bad. I'm not your run of the mill hater either, I've invested my own money into this project and after a few years now I've grown increasingly frustrated with their professionalism.
If they can't meet the Q3 deadline they set for themselves, they should stop setting deadlines to avoid looking bad. They're approaching their time-frame for 3.19 in a few days and they've still not even released 1.18 to the PTU. You can't sit there and throw out this tired old argument of "BUT ALPHA" either, that argument has been done and abused for so many years now that it's starting to look pitiful at this point.