I was pondering something else so I'll piggyback.
In true Australian fashion, I'll answer by telling you what it's not. "Why is it so popular?" Not because of the matches, mate.
I like to think that two masters of their craft, Messrs. Cena and Punk, could paint me a masterpiece. But their match last night was a McDonald's colouring-in book and they still drew outside the lines. Yes, they're old and broken, but Beethoven was fucking deaf; they should be good enough to work around their limitations like that deaf bastard and give me something nearing a classic.
Cody and Randy? Spare me. Pro-wrestling has passed all these people by (and others, too).
I, too, have witnessed this "boom" period, and I, too, am puzzled. I use quotation marks for "boom" because one thing that gets me is that this is a company that needed (indulge me here, I can't let go) Johnny Knoxville more than Johnny Knoxville needed them, that needed Logan Paul more than he needed them, that needed Bad Bunny more than he needed them, was it Drake(?) that potatoed Cody, they need Goldberg, they need Cena, something called a Jelly Roll. I'm not sure how booming the wrestling side of things are.
But they definitely, subtly, subliminally, rode the MAGA wave. Cody was out there in the exact shade of blue suit and exact shade of red tie as...someone....and a similarly dog-whistling tattoo. The Hispanics are rounded up and put on their own part of the show. Meh, my teeth still hurt. Hope I answered your question!