I suppose everyone interested in a good uTorrent client already got v2.2.1 (or even v1.x) installer for future use and won't switch from it in the next decade,

I suppose everyone interested in a good uTorrent client already got v2.2.1 (or even v1.x) installer for future use and won't switch from it in the next decade, so it's perfectly reasonable to create new Vuze from version 3.x for everyone else. You see, people even call streaming - "essential" :).