After using a /fill command, I was wrong and debris does still generate. I still believe that it is significantly rarer though, I've attached images of my survival mine that outputted no debris whatsoever (apologies for low render distance, playing on a not great device)
Update: I did what Xarkenz suggested and did a comparison of the same seed in different versions, doesn't seem like there's a difference. Sorry for wasting everyone's time. I'll attach some screenshots of the test anyways.
After using a /fill command, I was wrong and debris does still generate. I still believe that it is significantly rarer though, I've attached images of my survival mine that outputted no debris whatsoever (apologies for low render distance, playing on a not great device)
Update: I did what Xarkenz suggested and did a comparison of the same seed in different versions, doesn't seem like there's a difference. Sorry for wasting everyone's time. I'll attach some screenshots of the test anyways.