not problem on seals after 8 years. I've got a rebuild kit just in case there's a problem.
I don't think the dust seal thing is an issue for a performance driver who pays more attention to the maintenance than the gas & go drivers who bought these things off the showroom floor. You'll notice it leaking on your wheels long before they would if there is a problem.
Later
When was the last time you *really* did something with your Z to call yourself a Z enthusiast?