Wetsuit becoming less effective with age?

[CompuDude]

Type of neoprene also plays a factor. Hyperstretch and similar products breaks down faster than good, stiff Rubatex. Comfort is the tradeoff for compressability and useful life...

 

[Puffer Fish]

Ready for some fun !!?? Find the bouyancy of your suit when it is brand new off the shelf. After 50? 60 dives repeat step 1.....The more bouyancy your suit looses the less warmth to be had from wearing said suit. I have found that the higher end suits are more bouyant than the lower end suits for the same thickness suit. Lots of fun weights and time in a pool looking like an idiot trying to sink suits! Sounds fun right?

I am so right there on this one.. except I like to do it in a spring.

Depends on the suit and how deep one is going. I have.. ah.... more suits than I should...and they seem to loose about 10 or 15% in the first say 10 dives to over 60 ft (seems I'm doing a lot of 60 - 80 ft diving recently), then a very slow decline.