Apologies for reviving but just saw this thread.
Some of these really give me peace of mind on how long mine would probably last
Mine only has 87,000 on the clock, bought it in November at 81,000, but I do about 12,000 a year at least, drive it through winter, always let the oil get up to temp before driving hard, drive it over 5,000rpm when I can and where it's safe to do so. So the car gets used, which I suppose is much better than garage-queening the car, hibernating it in the winter, short trips, etc. I'm guessing that has the most stress on such parts (IMS, etc).
I haven't replaced my IMS but, due to the condition, full main dealer Porsche service history, and how it's been a daily by past owners, I'm not worried at all. Keep them coming guys, it's amazing to see these engines with high miles!
