Not everyone lives in cloud-cuckoo land. Also, you answered your own question. It's not really about the software. Both Firefox and Ubuntu have well recognised and valuable brands that guarantee a certain amount of attention and sales. Their ecosystem is also much wider, and in Ubuntu's case the potential number of developers dwarfs either Sailfish or FF. Jolla have yet to demonstrate any ability to attract OEMs in their 3 year history, and their sole wins in terms of major partners (Opera, Ericsson, Younited, Rovio) either fell through or resulted in disappointment. HW are apparently still on board .. but so far haven't offered the device on any of their networks save for 3HK. The €200m funding for an ecosystem hub in HK that Jolla announced 2 and a half years ago was pure fantasy. Realistically Sailfish is vying for 8th spot in the mobile OS stakes, not 3rd as Jolla have boldly proclaimed in the past. Unless Yota were to receive a huge slush fund from the Kremlin, they'd be positively insane to pin the fortunes of their company SOLELY to Sailfish.