This feels rather out of context. At the national level, the memes get attention, and while that's of some utility, the ground game is still where the most reliable bloc of voters -- seniors -- pay attention.
Harris and Walz wisely did their whirlwind tour of key states to work this aspect at the same time as memeing it up. Sure, NYT and WaPo were all over it, but it was also on A1 the next morning for both people who still subscribe to their metro print newspaper. And local TV news covered it. That gets older people talking, and Silver isn't exactly new to this concept.
This is a classic false dichotomy. The options aren't "memes or" -- the one being employed, "memes and," is simply ignored here.