Reading the title, I thought this was going to be about lost media.

A quick skim indicates that they're talking about heavily-cut nonstandard localizations and some kids' series that weren't any good the first time around. None of these are classic or groundbreaking (there was kids' anime on North American network TV before them), they're just old and mishandled.

Someone in the comments there said the same author called SD Gundam "perfect from start to finish" like a month ago but I couldn't find the article where he said it. I basically agree with all his picks though, a lot of anime was needlessly bowdlerised and made (more) insipid at the altar of "localisation".

Most of these were unwatchable back in the day. I remember being so pissed off when SD Gundam aired.

The points they made about Cardcaptors are mostly correct, but the adaptation we got also removed all the deeply problematic age gap romances which is a welcome censorship.