This is probably no more than a supply chain issue. While Vodka brands do differ, for purposes of a mixer on a plane, I'd place this in the No BFD department. While I wouldn't necessarily be thrilled if I didn't care for the Vodka if just mixing with soda and lemon, etc., I wouldn't place it in the rant-worthy department. Of course, others may differ in their respective approaches on how to respond to an unannounced and unexpected change in onboard Vodka brands. For every one of life's unexpected disappointments, we all have our place in what sets off our own personal tantrum-o-meters.