I hate to agree with them, but this is kind of true. We dont have armies of artists anymore who know how to do hand drawn animation like they did 30 years ago. Those days are gone, and those artists have long since retired, died, etc.

What they're really talking about here isn't the technology so much as the institutional knowledge that they'd amassed.

Its long gone, and been replaced by digital artistry, which is very different.

I'd be surprised if there's even an art school out there that teaches that stuff anymore. It wouldn't be worth it to teach bcz there isnt enough demand for that skill set anymore.