Original post by: Ben ,
Nope very rare. Only had it happen once on a iPhone 6+ White during screen replacement. Battery got unplugged during Apple logo boot causing the corruption of firmware. Another occurance was an iPhone 5C corrupted itself for no reason week after screen replacement. Both needed restore. Another one was iPhone 6. Corrupted itself when charging overnight. That needed restore too. Had an iPad 4 stuck on Apple logo. Update unbricked it. Actually I'd call it common based on my experience with iOS 10.