Why don’t tube amps sound like tubes anymore?


When I hear the latest tube amps I’m more reminded of what a solid state amp sounds like than what I remember a tube amp once sounded like. I say that, with most tube amps I hear today, but not all. Gone seems to be the lush tones, warm glow and natural harmonics I used to hear. What I hear is more of a thoroughbred, faster, sharper sound when I listen to a modern tube design today. Then why use tubes?
hiendmmoe
I'm new to tubes and people have said (in forum posts and in articles) that tube gear sounds like solid state depending upon *which tubes* are used.

But the conversation above doesn't really talk about which tubes very much, and people are mentioning that the responsible differences involve "caps" or "resistors" etc. How much do the particular tubes used play into the final sound of the tube amp sound? 
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Back in the days of yore Peter Walker (of Quad fame) arranged a comparative listening test of a tube vs. a transistor amp. Speakers were the Quad 57's. The amps were the Quad II mono's and the 303 (SS).. 15wpc and 35wpc, respectively. Signal source was 15 IPS copies of EMI master tapes. Listeners were members of the British audio press and HiFi industry. After extensive listening to both amps the general consensus was that no difference could be heard - both amps sounded the same!
The info above came from an article in HiFi News & Record Review that I read decades ago! Peter Walker was asked if he listened to his amps during the design process. He said no! He replied that his amps were designed to specifications and that no final listening was necessary! And this from one of the great pioneers of the Golden Age of tube HiFi.
Sorry for the redundancy! My smartphone was acting wonky and I tried to cancel the double posting!