I think the Su-35 deal includes tech transfer, which helps their domestic aircraft development advance past the variations-on-the-F5 stage. I doubt we'll ever s

I think the Su-35 deal includes tech transfer, which helps their domestic aircraft development advance past the variations-on-the-F5 stage. I doubt we'll ever see a production Su-57 run, and yes I know they're supposedly in serial production, but I'm skeptical it'll get past handcrafting each one.