I agree with you, I think Xabi needs one more year with Bayer Leverkusen to get a more respectable position. However, according to media reports, Bayern Munich are interested in signing him. Bayern Munich will part ways with Thomas Tuchel at the end of the season. They need a technical director and I'm sure they will also want to weaken their opponents as they always do. If they insist on Xabi Alonso they can finish this transfer, there are very few who can say no to them.
It is very clear, if Xabi Alonso leaves Leverkusen for Bayern Munich, then Leverkusen will appear unstable next season. That way, Bayern Munich can dominate the Bundesliga again and restart its glorious era, because it is very difficult for any team to surpass their performance. Having a quality manager like Xabi Alonso, and having equal squad depth in every line, it can be said that Bayern Munich has the opportunity to create an unbeaten record like Leverkusen this season.