You thought incest in anime was a '00s thing?
WROOOOONG.
Incest in anime/manga has been around for a long time, but it's become much more prevalent in more mainstream shows and television. The bigger question is why that's happening, especially because of how taboo a subject it can be. At least in older manga and anime, the big conversation of whether or not it is wrong is at least breached. Some more recent shows just give it a pass or joke around the subject while it still plays a large part of the plot. Now this can't be applied to all anime/manga and we'd need more hard evidence of what the contributing factors are.
My basis of some relation to moe culture include younger females doing overly cute things all of the time. Making that person a sibling is easier to introduce that character into the story. Add in the taboo for drama and there we go.
Also pretty much everything on the old school side are OVAs with decent budgets while the counter examples are as far as I can tell all TV series...some of which do look better than the older examples.
But sure, get a few hundred million lined up and we can get that old look back for one show.
Yeah, that chart isn't really helpful because it's a comparison of ovas, movies and TV shows. No one has the big budgets to do 26 episodes at the quality of a 6 episode ova or two hour movie. FYI, Redline was completely hand drawn and it took the production company several years to finish it. It was insanely detailed, but even trying to pair that down into an ova would mean a major drop in quality.
Let's compare OG Gundam and Seed for a better comparison, or any of the other TV anime from the 70s and 80s instead. I just miss hand drawn animation because of how similar a lot of anime look now. There's some visual flair here and there, but a ton of it just looks the same.
Edit: I wish I didn't know those Jojo figures existed because now I need them Bishop.