Some new production tubes are OK. My beef with them is that they do not sound toobie/warm. Remember, Russia and Yugoslavia (or whatever the other country is) are not the pinnacle of production/manufacture. China is the other source with cheap tubes. However, you can get some nice tubes, like Psvane, but you pay the price.
https://www.vivatubes.com/new-gain-matched-quad-psvane-6sn7-uk-vacuum-tubes/
https://www.vivatubes.com/new-gain-matched-quad-psvane-6sn7-uk-vacuum-tubes/