If we haven't tried it, how do we know the results? So Xabi Alonso option is still the frontrunner so far and there are no other suitable candidates for Madrid. Besides if you rely on experience of course you are right, but how long do you have to wait? Leverkusen will not stand in his way if he really wants to go to Madrid, on the other hand there are rumors about Jurgen Klopp but I doubt Klopp will leave his current position at Red Bull.
There is no clarity regarding this and Ancelloti himself will try to finish the season in the hope of winning La Liga even though we know this is difficult. Xabi Alonso could be Ancelloti's replacement because he knows Real Madrid well, but if Real Madrid wants to return to being one of the strong candidates next season, it is much better to find an experienced coach.
Speculation about Jurgen Klopp is possible because Real Madrid does need an experienced coach. I am sure that if Jurgen Klopp handles Real Madrid next season, they will be much stronger and will be able to face competition in La Liga and the Champions League.