Aeroflot’s services to CDG, AMS, North America, Asia, TLV, among others, have no availability in Flying Blue reward booking classes X and O permanently since the beginning of 2018. As a FB member based in Moscow it annoys me a bit given the importance of Aeroflot here.
I must admit that I worry about Aeroflot much less now because at some point FB started including Aeroflot fuel surcharge, which is quite hefty (102 Euros for a European economy class round trip).
To close the availability topic, there is an almost unrestricted FB reward booking class availability to other Aeroflot destinations in the continental Europe and domestic Russia.