I am old enough to have seen many of these changes. As a "baby-boomer" enemas were quite common when I was a child. Most bathrooms in those days had either a bulb. bag, or both and an enema was a common solution for a tummy ache and a variety of ailments.
I recall seeing the first add in a magazine for a Fleet enema in the late 60s. I recall their line was something like, "because the volume is low, the comfort is high", or something like that. My first experience with one was the birth of my first child in the 70s. My grandmother and mother told me to be prepared because when I got to the hospital they were going to give me a big soapy enema to clean me out. I got a Fleet. A couple years later for my second at a different hospital it was the same. One of my friends was a nurse at the time and I asked her about it. She said it is all about the money. Time is money to the hospital. A conventional soapy enema might take 20-30 minutes of a nurses time to prepare and get it into the patient. With the Fleet it is 5 minutes. Pop the top, squeeze it in, throw it in the trash. I hear that most hospitals do not even give you a Fleet these days.
Fleet type enemas sure seem to be popular. You can even buy 6 packs at CVS or Walgreens. I have no scientific evidence, but I bet they are mostly sold to soccer moms for a quick cure to period constipation, or gay guys for you know what.
There are lots of internet sources of enema equipment that would make even me blush, but I will bet the majority is used for kinky sex, not a cure for eating too many warm chocolate chip cookies before bedtime. Hardly anyone gives enemas to their kids anymore.
Someone else mentioned colonic irrigation is more common these days. Maybe so, because a few Hollywood types proclaim it is the key to a creamy white complexion or something like that and everybody wants to try it. I have not. Is it really that different from a couple of good high enemas?
A lot of things have changed for a lot of reasons. Personally, I like being stuck in the old days.