I'm from NYC with family that's been in the system (thankfully it's been a long time since, but I got stories of close relatives from the Tombs to Rykers from Giuliani era and prior. DeBlasio didn't eliminate solitary confinement but he did decrease how long inmates could be kept in. Here's the changes he made
De Blasio Plan to Eliminate Solitary Confinement Falls Short for Inmate Advocates
But there were still major issues from the activist wing.
That was the big issue when Deblasio improved it somewhat. The lack of representation and clarity on how one could improve their situation.
And that's not to say there weren't real improvements. But the improvements basically just meant not treating people like straight-up animals anymore.
DeBlasio took some good steps, but it was pretty low-hanging fruit. It's important to note that Deblasio's system already set up to reward good behavior and punish bad. But the debates that continued were about who decides about the qualifications. The semantics games that Deblasio played painted his action as more than what it was and Adams is running with that same baton.