FWIW, my wife also found Prof. Grimson to be “too monotone” and asked me “how do you stay awake during those lectures?” but without bringing age into it.
Side rant: I am the child of baby boomers, and I think their generation had it much easier than we do. I also get infuriated with the callousness and lack of empathy exhibited by many people from the Boomer generation. But rude retorts like “OK Boomer”, aside from being disrespectful, only encourage further callousness and lack of empathy.
Also, a decent chunk of the content in the magazine is actual fiction by actual accomplished fiction writers (not "failed" ones). You don't tend to see it linked from HN obviously, but that's very much the vibe they're going for. Think of it as part commentary on the times and part literary fiction magazine. That may not be your cup of tea but it is appealing to lots of people.