That's exactly what I think, as well. The whole NOS tubes hype started around the turn of the century, propelled by the audiophile folks and then slowly crept to the musician community. Back then, NOS tubes were much more abundant and accordingly, cheaper. New production tubes, at that time, were nowhere near today's quality or quantity.You didn't ask me, but there's no way I'd pay $100+ for a 12ax7 when new ones are so much better than they used to be.
. Sort of lost interest in guitar and gratuitous tube rolling
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...these were Ultron which is likely re-badged RFT as well, BTW...