It's aged just fine in the fact that people still prefer it. I was in a Japanese import cosmetics shop with my wife recently, and they had a section full of Sailor Moon branded cosmetics... all with '90s style art on them.This really doesn't surprise me. I mean, again, a lot of the people wanting these grew up as young kids watching the 90s one, but it really hasn't aged well at all. Crystal is to 90s SM what Kai was to DBZ, but with fully updated art.
The main argument that I could give for the Takeuchi/Crystal art not taking off is that it's too "precious". It's full-on shoujo, whereas the '90s art leans a bit more mainstream and is more relatable in terms of expression.