Originally Posted by noimagination

I have a 1995 Cannondale T700 (alloy, steel fork). That's a touring bike.

I did not measure the "stiffness" when I bought it, so there's no way to tell if there's been "any significant loss of stiffness ... over time" (29+ years > 50,0000 miles). And I can't go by feel because, of course, any changes would be so gradual as to be imperceptible, and would probably be swamped by other factors in any case (I'm on my third set of wheels on the bike, and I've used different tires, different widths of tires, different saddles, replaced the crank, etc.).

Your question is ridiculous. Sorry. If you want a new bike, you'll have to find another excuse.