That's very hard to say.

Thus, meanwhile the best proof are orbituaries for fallen pilots/crewmembers. That's always taking weeks, though.

That's very hard to say. It's not only that I can't know how many of Russian jets are coming down deeper behind their side of the frontline: not every loss is recorded in the social media. Foremost, the Russian social media remains closely monitored, and the mass of negative news is quickly 'burried' either by shit-storms, or by authorities.

Thus, meanwhile the best proof are orbituaries for fallen pilots/crewmembers. That's always taking weeks, though.