I'm planning a XC/bikepacking build, and considering a belt drive, and looking to answer a couple questions.

The most recent reviews of Gates belt system performance are from 2014, and none really address two main concerns for me:

First: how does it perform in mud and other rough riding for MTB? I'm aware that dry conditions make it squeak and alignment is critical, but no one really talks much about its performance in muddy conditions. Does it really shed mud as well as Gates advertises? Does the advertised belt lifespan really long enough to justify the extra cost?

Second: A frame split seems like it might cause frame integrity issues over time, especially for MTB. I'm not an engineer so I dunno how to answer this for myself. Has anyone experiences stability issues like frame flex/split breakage/damage?