That's a scary long list. It includes their most popular signature flavor Hawk Juice. Not to mention a huge chunk of their "fruit" category.
Right. There are two things to keep in mind though, contextually: first, MBV carries a huge huge selection of juices, over 300 IIRC, so even if you dismiss the ~80 juices on the list entirely, you still have no shortage of options. Secondly, and more importantly, MBV is surprisingly open and honest when it comes to erring on the side of the customer's safety/well-being. In other words, MBV will add juices to the list if there's even a dubious report that they don't play well with plastic tanks.
Personally, I'm happy to err on the side of caution myself; if there's any question that a juice will break a plastic tank, I either don't order it or I only use it in my glass tanks or dripper. Since I don't have any interest in cinnamon, and don't particularly care for citrus-y flavors, that's not a big sacrifice. I totally agree with you that the concern is not for the hardware, but for your health.
I just think that concern's a tad overblown as things currently stand. Avoid problem juices, and you should be fine. Or, like I said, buy glass. But don't be surprised if that new glass tank doesn't perform as well as the plastic one you're tossing aside. Unfortunately, relatively few designs are available in glass, so if you're happy with how your current system performs, and you don't have a pressing need for a cinnamon or citrus juice, you might be better off standing pat.