So called, home market equipment made today in garage is designed by
mediocre engineers, who don’t have enough education and talent to work
in Hi-Tech.
Except for those that have degrees?? Obviously this statement is false.
ALL vinyl record lacquers disc (from 70x up today) are cut by DD
turntable machines. Older lacquer where cut by worm-gear turntable
machines.
This statement is also false. Many LPs were cut in the 70s and 80s (and today) on Scully lathes. There are a good number of Scullys still in service (I have one FWIW). It was the Technics SP10 MkIII that was used for LP mastering, not the MkII; the latter has insufficient torque.