I'm sorry to hear about your problems with Bosch Platinums. I haven't always used them in my autos but the one'* I have used them in gave me exemplary service.
My wife'* '92 Honda Accord EX just turned over 84K with them. Absolutely no problems.
Prior to my '92 Bonne I had them in an '84 300zx for 145k and now my Bonne is on its second set. I changed the first set at 120k. Man, they looked like the day I put them in! Now I'm on my second set at 84k.
I have 20k on a set in my '95 Vette LT1 with 20K (315HP). Absolutely no problems to redline either.
Now, I'm probably not as hard on my pistons as some of you, but I have been known to get on it when the urge arises.
PS - To those of you experiencing premature failure of the Bosche'*, I assume you are applying a very small amount of secondary Scandium powdered pellets to the tip of the negative posts aren't you?