My 2006 DB9 Volante still had its original paint protection film behind the wheel arches. The film was in less-than-pristine condition when I took the car to a detailer this week, so I asked him to remove it.
He budgeted 15 minutes per piece for removal, but with one piece off he called me to let me know it took more than an hour, and he now expects it will take a similar amount of time for the other three sections. He's a well-regarded pro with many years' experience and all the equipment and chemicals in his warm, well-lit shop (where my car has been sitting for two days).
Bottom line: don't leave your PPF on for 15+ years or it might never come off!

 

Be thankful he didn't take some paint off with it.
Thanks,
JH

 

According to my detailer the more modern PPF is a lot easier to remove but the PPF on my sills needs replacing after just one high speed, cross country 1,500km trip so there is no danger of it still being on in 15 years time

 

I took the PPF off of my 2009, it was starting to yellow and I'm pretty sure it was original. It took me 3 or 4 days of 3-hour sessions to get it all off just the fender. The actual film removal isn't bad, but it leaves behind this residue that only comes off with a ton of elbow grease. The expensive 3M specialty adhesive remover was the only thing that would even soften it. Definitely do not let it sit for too long.

 

Count yourself lucky. My detailer took 20 hours to take the front quarter PPF off my 2007 Vantage and clean up the front end afterward. Fortunately no paint came off in the process.