Nope. We've been producing our collapsible guitars for years and our guitars are played by some of the best guitarists on earth. We've personally been on hundreds of flights with our collapsible guitars. Not a single complaint to date about string life.
HOWEVER, if you play your guitar daily, and you're a tone freak, you should change your strings at least once every 3 months or every 300 hours - whichever comes first. This assumes you're using coated strings, and is recommended for all acoustic guitars - regardless of if they're collapsible or not.