The problem with the American Märzen style is that it was created back in the nineties before we had affordable access to richly flavored Pilsner, Vienna, and Munich malt. In essense, it was a make-do style like a lot of other early craft adaptions. Crystal/caramel malt was overused because it was the primary type of malt available to brewers other than American 2-row, which is the tofu of brewing malts. I am certain that American Märzen will get updated when lager brewing comes full circle in the craft world. However, it is going to take a lot of effort to undo the damage that a style that was created during a decade of make-do brewing has done to the American beer drinking audience. The reality is that the American beer drinker has associated Octoberfest with a sweet, bland, caramelly mess. I am certain that is the reality Sierra Nevada has experienced every time they partnered with a German brewery for this seasonal. This year they went at it alone and the sweet, bland beer known as Sierra Nevada 2021 Octoberfest is the result. I do not fault the brewery. They are in business to make money. If the American public does not know the difference between German Märzen, German Festbier, and American Märzen and prefers American Märzen out of shear ignorance, any brewery that is in business to make money is going to cater to that ignorance.