The Su-57 Felon has been noted for being the first Russian-built aircraft to feature stealth technology. At the same time, it further served as a test bed for the basis of a family of stealth-based aerial combat systems that could include unmanned aerial systems (UAS).
The biggest knock against the Su-57 remains its numbers – as Moscow simply doesn't have that many, and won't likely ever have the Felon in significant numbers.
"Establishment of an expanded network of Russian military bases is mutually beneficial and important for all participants of the emerging perspective defense bloc," Viktor Bondarev added