"Well, I've read all the arguments, and I think I may have been being overly cautious. It is indeed a concern that we might lose our freedom in a 'merge', but I have been convinced that it isn't a major concern (and of course we reserve the right to re-fork).
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From the article:
If they can do this to PEAR, what's next, Apache?""For 28 years, we've done what we wanted to do, and there's no reason to stay and generate more of the same data," he told the New York Times. "If people don't believe us after all the results we've produced, they never will."