Here's why the Ronaldo transfer is realistic IMO:
Real Madrid are on decline and face uncertainty now that Zidane has left. Add that he has achieved everything, including 3 CL in a row. Also, Ronaldo is probably looking to cement his status as the greatest of all time, his argument would become stronger if he wins the league and the CL for another team. PSG is a definite no for Ronaldo, because he will feel insecure about Neymar and Mbappe. Man Utd will also be pointless because he has achieved everything there anyway. Which leaves him with either Bayern or Juve, both of which will guarantee him at least the league and a shot at the CL. Quite frankly, Serie A has a more appealing history, and 50 years in the future it will be remembered that he has won it at EPL, Serie A and La Liga despite the 'tenderness of Serie A.' Thus it makes sense. The only stumbling block are his wages, however if Adidas are really willing to help out, then it is very much possible.
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Edit, the only thing I would be against is selling Dybala and Pjanic for this transfer to happen because I think we should only be expecting 3 years from Ronaldo. Selling Higuaín for the rumoured 65 million and getting rid of a few fringe players would be more appropriate.