That’s my thought. Fighters have been something Ukraine’s been pushing for for months and months with no success and no evident reason why not other that NATO willpower. Russia fucks around and very suddenly, coincidentally, finds out.So Russia runs into US UAV and Ukraine gets anywhere from 20 to 40 Mig29's. Your move Russia
The open (versus previous surreptitious ‘parts kit’) transfer of fighter jets is a significant move down the chess board. The next obvious question will be “ok, now there’s these jets, so why not those jets?”