Many of the old anime from the 80-90s that's considered today the great classics and had great success would have past almost unnoticed if they were released today, and viceversa. In the 90s you had access to only a few anime, curated to only the best of each season.
So logicaly, if something like "evangelion" or "cowboy bebop" came out, you saw it because it was one of the few things avaliable to watch in the west. You didn't have a wave of harem isekais making hard to find the good anime of each season.
Now you have access to every anime, like 50 each season, and you have to decide a few to watch. Most ppl just stick with the mainstream battle shonens/bromance/isekai of the season, and ignore the more serious works that would be the "evangelion" of the time.
If Eva or similar works were released today they would probably just garner a relatively small group of fans among the adult viewers and maybe become considered a cult but would not become succesful with most anime fans and nowhere near their success in the 90s.
In a similar way, many modern anime, that are precisely buried by the mainstream ones, would have been the "evangelion" of their time if they had been released on the 90s. I'm thinking stuff like From the New World, Kyosugaiga, Golden kamuy or re:Creators but take your pick.
here are many modern anime on the level of the old classics but people just don't watch them because there's too much to watch and they insist on watching battle shonen at 30yo then complain all modern anime are the same and old anime was better.
I talk about all of that in deep in one of my old articles about anime https://www.kukuruyo.com/2019/10/23/its-not-true-that-old-anime-was-better/