I'm no luddite when it comes to modern animation; there is an absolute deluge of modern animation that I love. Most if not all of it would have been impossible with traditional animation techniques.
But as for the charm of traditional animation, the "charm" of those visual imperfections wasn't the aesthetic value of the imperfections themselves; it was the slight breaking of the "fourth wall" and how it reminded me that human beings physically arranged and photographed every single frame of animation. Digitally faking those imperfections would be silly to me.
As for something like artificial film grain noise in Hollywood, I suppose that perhaps some people love the fact that it reminds them of the physical filmmaking process. For most others I suspect it's a purely visual aesthetic charm, that is indeed ripe for digital replication.
Art is subjective (always a dangerous thing on HN) and I won't say anybody is wrong if they feel otherwise about this. However, it would be objectively true to point out that the appeal of "analog imperfections" goes far beyond their face-value aesthetic appeal for many.