I had always trained hard and tried to consistently get stronger when I was younger, but I wish I had jumped into DC training many years sooner, at least 4-5 years earlier. Before that, it would have been hard with college and stuff, but afterward, it would have been fun to see how it took off with a fresher, younger, and less injury body, lol.
I've known of Dante since the 90's (online, not IRL, or in person), and for some reason, I never jumped into it. I think what happens is you find a lot of people you trust, who throws out good information, so you stick with those people for a good while before changing it up. You fit in what best fits your schedule and gym, and not necessarily what will get you from point A to point B quicker (and possibly better). Dante was just as popular, if not moreso, in the 90's than he has been these last 10 or so years...believe it or not. At least it seemed that way back then as a youngster getting into everything.
There was a lot of years I had to hit the gym right at 5pm, getting off hours. The gym was always super busy, so unless i wanted to be in there 3+ hours doing what I had planned, I had to get whatever was available to hit the intended body parts. I may have went in wanting to hit incline press, but had to find something else for chest. That wouldn't work with a DC split schedule since you are trying to best your prior workouts.