Comment by bivlked

Been running 2.0 on Russian DPI for a few months - works fine. The old version (1.x) randomized packet headers, but ISPs figured out that random bytes are themselves a fingerprint and started throttling (~3 Mbit on some mobile ISPs here). 2.0 is smarter - packets mimic actual QUIC or DNS traffic instead of looking random. ISPs can't easily filter that without breaking real QUIC, which is half the internet at this point.