I think it will be easier to get rid of Biden than Kamala.
And surely they can’t run Kamala in 2024.
If Biden doesn’t make it to November 2024, and Kamala is the incumbent President, it would be very hard for the Democrats to deny her the nomination. On the other hand, if Biden is still alive in the spring of 2024, all the ambitious Democrat politicians will be fighting for the nomination. If the Democrats don’t pick Kamala (at this point I don’t see the DNC clearing the deck for her the way they did for Biden in 2020), black Democrats will be plenty ticked off unless the nominee is another black person (of course Kamala has no “African-American” ancestry and probably less than 25% African ancestry)—but who have they got who would be a credible candidate? Booker? Stacey Abrams? Bennie Thompson? Val Demings? Maxine? Sheila Jackson Lee? Susan Rice?