WarTranslated cites a Russian Telegram warblogger, mentioning that the Ursa Major was significantly irreplaceable, and that its loss has delayed plans to improve northern port infrastructure and exploitation of the Northern Sea Route, potentially allowing icebreakers to clear a path through arctic waters to the east.
...which might be awfully handy for shipping oil, gas, and goods to and from China, since the railway isn't working all that well.
Oh well!