Laminate stocks are much more stable than wood. I read an article on the AccuStock recently. Its main contribution is to create very stable, low-cost synthetic stock. The two had previously been largely incompatible: one could have a low-cost synthetic stock, or a one could have a very stable synthetic stock, but not both at the same time. It is a pretty important step, particularly for mass-production, to be able to offer both.

I don’t think you’re missing out on a thing with your laminate, though. Laminate stocks are inherently more stable than wood, and usually less subject to flexing or temperature changes than synthetic stocks. And, to top it off, they look and feel nicer than the plastic ones.