The conclusion is that anime are by-and-large
still hand drawn (in the videos I posted, you can
clearly see the animators drawing by hand). As for the reason why newer anime look "different", look at the very first link I posted:
The reason why newer anime look "different" is because of digital coloring and composition; the characteristic "gritty" look of older anime is a result of the
ink-and-paint process, in which each drawing is transferred from paper to a cel, painted (from the back of the sheet), photographed, and filmed.
It's fine to prefer the look of older anime—I'm just trying to point out that anime is
still drawn as it used to be.
Interestingly enough, a faux-
cel aesthetic
is achievable using digital tools, as seen in the first episode of
Shinya Tensai Bakabon. It's not
exactly the same, but it's fun to imagine the possibilities.