Metal used to be about the big chugging tones, but for some reason that thin, no-bass, mid-heavy Djent tone came along, and now no one wants chugging bass anymore. It is about removing everything from your tone but the metalic upper mids. Also, I think as tube amps are kind of going out of fashion, and digital is in, people are willing to compromise tone for smaller packages, and less tubes to replace. Most people want the smaller amps because they are small, cheaper, cheaper to retube, and sound pretty good... not as good as their big brothers, but good enough for the compromises. I had a VHT D120 several years ago. It was the only amp that stood up to my Triple Recto for depth. That amp had so much weight behind the notes it was crazy. It was SO loud with a bright presence also. I think it was the only amp I have ever sold because it was just too loud for home, and because of the way the frequencies were set. It physically made my ears hurt to play it at home. Like I said before though, depth and tightness comes from the big caps and transformers, so this amp was probably the tightest I ever heard. Each palm mute was like a ninja kick out of the speaker right into your eardrum.