This discussion happens at least a few times a year, it seems.
It is difficult for our US gents to comprehend that MFS is not as popular worldwide.
Someone even gathered data from most UWW events as well as Russian age level nationals over a few year span in one and once you go down the other UWW events that take place not only in Europe but Asia as well, the disparity between the two gets worse. MGR is far superior worldwide insofar as popularity. It was even broken down to not include 'local' athletes (meaning no Polish gents if in Poland).
You have to consider that to go to Poland, even if from another European country, it isn't exactly cheap. You need hotel(s), transportation, entry fees, etc. So for it to be roughly ~30% or more insofar as entries go, that is saying something.
I am of the mind that if we were to transition to MGR and MFS in college it would help both styles tremendously. Have the coinflip dictate who gets choice, like football. In football when you choose to kick or receive, the other guy gets to choose which side. So in wrestling, you can pick whether you start at MGR or MFS, the other guy can choose what weight to start at - or if someone chooses the weight, the other guy can choose MGR or MFS, with the weights alternating.
There would be an interesting dynamic for individual tournaments. If a school does one individual tournament (Midlands) they can choose MFS, but if they do a second, they must participate in a MGR one as the second one.