We not gonna sell at all. Him and De Ligt only long term CBs.
And he defenitely shown more top level defensive talent then Caldara did. Who we were hopeful for because of his age, but watched him enough in Atalanta at the time and it was mainly just a decent defender who stood out by going up in attack and scoring few goals, an extra frontman type CB.
This is not hindsight talking, but most of what I saw of him was a potential backup/rotation option for Juve while Demirals actual defending looks like a starter level and future long term option. He needs to be little less reckless, but his overall ability is of a defensive wall, top level instincts and tackling.