Business Insider
Alex Lockie
July 12, 2018
Excerpt:
But despite Russia's nonstop praise for the plane and dubious claims about its abilities, Borisov said, per The Diplomat: "The Su-57 is considered to be one of the best aircrafts produced in the world. Consequently, it does not make sense to speed up work on mass-producing the fifth-generation aircraft."
Justin Bronk, a combat-aviation expert at the Royal United Services Institute, told Business Insider that Borisov's comments "could be charitably described as an unreasonably optimistic reason why they stopped production."
Basically, Borisov said the plane is so much better than everything out there that Russia doesn't need to build it — a claim Bronk finds unlikely.
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https://www.businessinsider.com/russia-admits-defeat-su-57-not-going-into-mass-production-2018-7Borisov must translate as
Pelosi.