I would add that the popularity of the original machine and the vast library of games built off of each other, and the result is a large community with love and nostalgia for the C64. That in turn perpetuates modern projects, newcomers to the scene, and new generations of community here for their own reasons.

"Retro" exists independently of "nostalgia:" it's a broad cultural category that encompasses fashion, technology, and new reasons to appreciate old things. I would recommend Commodore-adjacent stuff—VICE, TheC64, Ultimate 64 in a new case, MEGA65, refurbished machines with new accessories and adapters—to people with a variety of interests that have never seen an original Commodore.