How many drivers are currently driving for teams they're confirmed NOT to drive for next year?
Hamilton, Ocon and Sainz for sure.
At some point, having a driver with nothing to lose in your multi million dollar machine can cause some trouble! I know they're all professional race car drivers, and obviously in Ferrari's case they can't just move Sainz out and put Hamilton in, but certainly Mercedes and Alpine are going to find themselves at a point where putting in a reserve/junior driver might be better for all involved.
Ocon in particular, is he going to settle down and take fewer risks? Maybe someone can convince him the only way to find another F1 ride is to prove he's not reckless, but he's had a whole career to show who he is as a driver, and if he changes now, who knows if anyone wants a veteran driver who is an unknown quantity?