This secondary decline described in TFA is happening within a smaller, more dedicated player community. Maybe it's the competition from other games.
As for the others, padel is far far far more athletic than pickleball (and paddle tennis for that matter), and I would argue even more so than tennis. I grew up playing tennis and I love it, but padel is more finesse and also scratched that itch of learning a whole new sport. I learned it in the UK 3-5 years ago, and I do very much miss it. Literally I think there is one court in all of New England, it is crazy how much of a not-thing it is considering it was invented in Mexico.
It would be interesting to compare Florida residents with those elsewhere on the east coast to see if they are actually preserving more of these things than we think.
Don't have speed bridge.
And chess has horseys.