Israel is and has been well served by Bibi, but he is only human, and cannot serve forever at full capacity. I’m hoping he has a few protege, quite a few.
None to date, unless they're hiding in the plain sight.
Not having a protégé has been one way Netanyahu has held power. There hasn't been a reasonable answer for "if not BiBi, who?"
This has been a successful political maneuver, if not for Israel, certainly for the man.
Gideon Saar or Naftali Bennett are the most likely replacements for Netanyahu.