IMO...
Chauncey does not want to be back and the Blazers don't want him back.
Billups was hired to give a playoff team some defensive punch. That was the knock on Stotts, great offense, no defense. That's what Billups was sold, not a multiseason rebuild and tanking. You think Dame was upset when the Blazers drafted Scoot, so was Billups. The Blazers could have traded the pick and brought in some veteran talent. Instead, Billups is stuck in rebuild tanking hell. (At least that's how he views it.)
Now the Blazers don't want Billups back either, not because he's done a bad job. He hasn't. Our young players are developing. Nicely. So much so that the Blazers actually had to work NOT to make the playoffs this year. But that creates its own set of problems. The expectation is playoffs next year. We could trade Grant, Ant, and Ayton, and the fans are still going to expect the Blazers to make the playoffs next year. That's a huge step to take, regardless of how close we came this year. If we keep Billups and don't make the playoffs, Cronin's and Billups' jobs are in jeopardy. Heads.Will.Roll. What the Blazers need and want is a young coach, someone to develop and fight together with a young team. The fans will forgive if hometown son of a Blazer legend David Adelman doesn't get this team into the playoffs his first year as the HC. Adelman gets Cronin 3 more years of job security. 3 more years of rebuilding/retooling/rewhateveryouwanttocallit.
Again, just my opinion.