These days, 90% of the issue is coming from the wood itself. The maple used in bats is the same that instrument and furniature makers are using, so price is becoming dearer, as availability is becoming scarcer. Companies (especially the smaller ones) are having problems finding Canadian Rock Sugar Maple. Instead, woods such as Bigleaf Maple, and younger varieties with a less dense grain pattern are being used. This is creating large swings in quality, as the consistency is declining. Instead of a billet used that has a graining pattern consistent with an older growth timber, there are far more variables such as artificially aging and drying the wood through microwave based kilns ans seasoning techniques. Although the gains are marginal compared to ash, MLB has seen a shift which is causing bats to be produced which are dangerous as well as irresponsible. Taking a SamBat for instance that was made 10 years ago, no longer bears the characteristics of a recently produced bat. Instead, profiles of the barrel and taper are being modified to compensate for the deficiencies inherent in a less than desirable product. Maple tends to shear, whereas ash cracks and splinters leading to the dangerous situations that are seen today. In my current league, maple bats were no longer legal to use as of 2008 due to this issue. That said, the maple bat's biggest hurdle is the desirability of the maple bat itself. AND IF MLB EVER, EVER ALLOWS THE USE OF COMPOSITE OR ALUMINUM BATS, I WILL NO LONGER CHOOSE TO WATCH.