Peter Wiggins, for fcp.co:
I was starting to get concerned about how long we could continue to edit in FCP7. By now it had had no support for three years and very little in the way of updates for 2 years before that. At some point it was going to break, already we were seeing slowdowns and hangs. Yes we could probably hold out another year but that would be all. Time to look for a replacement.
All in all a great read, and much of what Peter describes is what FCP7 editors have been grappling with since 2011.