But digital cadavers completely fail to capture the three dimensional relationship of the components of a body. I have probably every atlas on the market, paper and digital, and I still occasionally go to our affiliated school’s lab to interrogate a body when I need a refresher.
There is nothing even vaguely approaching a replacement yet, though I’ve been hearing about how we can replace real dissections with simulations for literally decades. I do wish folks who’ve never had to navigate the internal landscape of a body would stop offering their opinions on how one should learn it.
I'm not recommending we end the use of cadavers -- and this is a discussion site, not a medical school!
How long that takes I would only embarrass myself by guessing.
The best way to learn, at least for me, was in practice. During the year that I took anatomy, I would go to the laboratory almost every single day and spend all day there going over the structures of the human body over a hundred times. I needed to physically manipulate the pieces in order to understand them.
For those of us who don't have to, I recommend:
https://www.zygotebody.com/