Musicgioni, I agree with Atmasphere. You compare the Cosmos to some middle of the road vintage direct-drive turntables and then make a sweeping generalization about all vintage turntables. Likewise, you compare vintage receivers to your very high quality modern system that consists of separates, and again you make a sweeping generalization in favor of the latter. My point is that there are MANY vintage turntables that, like your Cosmos, also blow away the vintage turntables you listened to. (Try a re-plinthed Lenco or Garrard or a restored SP10 Mk2 or Mk3, or a restored Exclusive P3 or Kenwood L07D or many top end models of Denon, Sony, Yamaha, etc., in proper plinths). As regards the electronics, etc, the art of solid state audio design is always a slave to the available technology of the individual parts. So, because these days we have faster, better, transistors than ever before, better caps and resistors, too, it is not surprising that today's solid state products are likely to be superior. I say "likely" because in many cases the build quality of the older stuff will mitigate the negative effects of out-dated parts. As for tube gear, your generalization just does not hold up.
The other thing you don't mention is the condition of the products you auditioned. Anything more than 20 years old probably needs to have all its electrolytic caps replaced, for example. Old direct-drive tt's need to have that done, especially. In many cases, outdated transistors in some of this gear can be replaced with modern and functionally superior equivalents, which makes a huge difference in performance.
The other thing you don't mention is the condition of the products you auditioned. Anything more than 20 years old probably needs to have all its electrolytic caps replaced, for example. Old direct-drive tt's need to have that done, especially. In many cases, outdated transistors in some of this gear can be replaced with modern and functionally superior equivalents, which makes a huge difference in performance.