My dad, aged 76, is a regular player I DM for. If he lived in the same city as I did, and there was no pandemic, I would be thrilled to run a game for him and his friends.
Just like you get a different vibe playing D&D with kids who grew up with Adventure Time and Minecraft, playing D&D with people who grew up with the Appendix N books, even if they didn't play D&D at the time, has a distinctly different tone. And, of course, life experience colors how each generation plays. (My dad, a Vietnam vet, does not view war and combat as the grand adventure younger players often do, for instance, but something to be avoided and mourned.)