Those age crosstabs are wild. Do we have confirmation of this insane gap with other polls? I know tons of young DeSantis fans, myself included, so this bewilders me.
Anecdotally I've definitely gotten the impression that older conservatives want someone more reliable and possibly more electable. Keep in mind, older Republicans wanting a more stable and younger candidate does not equal disapproval of Trump.
This is definitely true. Older (as in 60+) conservatives don't care as much about "owning the libs", middle aged conservatives are mixed about it and younger conservatives, since they are often on right-wing social media, are the most "own the libs" people.