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Having said that, I've had far too many conversations with far too many professional filmmakers and editors (I'm talking "multiple all-nighters every week editing multicam RED; invitations to Cannes; contracts to produce music videos for multi-platinum selling artists and promos for Fortune 100 companies" professional) about the weaknesses of Final Cut X to have much regard for the opinion you've shared here.
Ultimately, if the intended users are dissatisfied, then Apple missed the mark, any rationalizations from armchair analysts notwithstanding.
By the way, you left a complaint off your list: Zero compatibility with project files from previous Final Cut versions. Hope you've got some free time to recapture everything you've ever shot.