our area (Washington DC and about 70 miles around it) is growing, thanks to big government. I've been watching the area for years now and there are distinct bands around the city.
Within the city itself, there are older and new gentrified areas with not much space except for maybe a bucket pond so the city itself is out.
Then there's the older established areas that's been there 100 years and there you will find the most ponds, perhaps the older people living there.
Then about 30 miles out are all the new suburbs, put in place in the last maybe 30 years and many in last 10 years as you go further out.
These areas tend to be settled by younger people in their 20s and 30s. I moved in the outer belt in my mid 40s so I was one of the oldest percentage wise, maybe top 5 or 10% and now 12 years have passed so I'm in late 50s.
These youngsters who are now in 30s and 40s, work in mostly IT and intell fields in government as goveys and contractors. They live a busy life with long commutes and stressful lives and don't seem to have time to do much more than mowing their manicured lawns. Most don't even have small gardens, much less ponds.
For recreation, ponding has been replaced by facebook and tweeting and they're largely insulated from the natural world, even though it seems they moved out from the city to enjoy a yard and some nature.
This probably didn't answer the question, but in general, ponding seems to be being taken up by the retired people. When the youngsters today reach retirement age, I'm not sure they will take up ponding. I'll define youngster as younger than baby boomers born in 1965 and younger, maybe even 1955 and younger