Today russia lost in russia:
• 1x of its most modern fighter-bombers
• 1x of its most modern fighters
• 2x of its most modern electronic warfare helicopters
First: that is funny as hell :-)) The Su-35 fighter was supposed to protect the Su-34 fighter-bomber from Ukrainian fighters, and the two Mi-8MTPR-1 helicopters were supposed to protect the Su-34 and Su-35 from Ukrainian surface-to-air missile systems. I know I repeat myself, but once more for the vatniks: all russian weapon systems are garbage.
How did Ukraine shoot down the russian aircraft? I don't know, but I doubt russia's air defense made four errors in day. So either Ukraine moved a air defense system to the border with russia and has been having fun with shooting at super easy targets in russia, or Ukraine has now the ability to use AIM-120 AMRAAM - either firing them from Mig-29 or Su-27 or F-16... but for the latter Israel would have had to train Ukrainian pilots on F-16s, which Norway, Denmark, Netherlands, and Belgium would have had to donate with US approval... sounds improbable.
Whatever happened: russia will now be unable to fly within 100km of Ukraine, which will help protect Ukrainian cities AND help very much when Ukraine begins the counteroffensive. All in all: a great day for the world :-)