I am confused. Do you mean to say that these vintage pieces are left behind, or that they can compete with modern designs?
"Back in the day" we referred to Phase linear as "Flame Linear." Not only did it sound like crap but it it went up in smoke on a regular basis. Lots of power for low $$ when it worked, unfortunately it didn't work all that often. At that time, Carver was "brilliant" in marketing unconventional designs that turned out to be either unreliable or sounding like crap or both. Maybe he's gotten better since then.
"Back in the day" we referred to Phase linear as "Flame Linear." Not only did it sound like crap but it it went up in smoke on a regular basis. Lots of power for low $$ when it worked, unfortunately it didn't work all that often. At that time, Carver was "brilliant" in marketing unconventional designs that turned out to be either unreliable or sounding like crap or both. Maybe he's gotten better since then.