"The statement that all new cartridges are good is false"
Has anyone actually made such a statement though?
"AT150MLX is not even near the old AT-ML170 or AT-ML180 series"
For that to be true the AT-ML170/180 would basically have to be the best cartridges ever made, by some margin, as to my ears the 150MLX/Sa are both reasonably close to being state of the art. Maybe they are just that, as I've never heard either, but I kinda doubt it. Or at least I doubt that it is anything even vaguely approaching an objective fact.
As far as reasonable & good cartridges go, the
VM540
and the lower-end Nagaokas are no doubt among the better bets available today.