I think an RL ban is going to hinge on demographic, rather than practical considerations. The EDH community is large enough, now, to really have its own political blocs, and complex interactions between them. If ownership of RL cards has continues to shift from invested players to non-playing investors, eventually it will have no credible advocates in the community to pressure the RC, while its opponents will grow in number and credibility.
Until around 2014-2015, the main proponents of the RL were long-term fans, who have a voice out of proportion to their number. At a local level, this class of players are often regulars at their LGS, and were early adopters of EDH who got others into the format or the game. Online, while they may not have had the megaphones of various BNFs and streamers (which have always skewed populist-anti-RL), they also tend to be more active and plugged into debates on the format, and many of them have a kind of seniority on various fora as well. These combined to give them outsized, though not unjustified, norm-shaping power and made them the most dangerous bloc for the RC to displease.
The investors are their opposite in nearly every way. They tend to be new arrivals, either from collector culture (eg comic books) or Reddit daytrader culture. They are almost entirely absent from local stores and groups, and seldom venture outside their silos online. When they do, they tend to regard the majority of the playerbase as rubes and are regarded as carpetbaggers or poseurs in return. Where arguments against the RL often had to be precisely worded to avoid offending invested players, dunking on non-playing investors is an increasingly popular argument against the RL in itself.
Most importantly, the investors are not introducing anyone to actually playing EDH, which means they aren't shaping anyone's initial ideas on what EDH ought to be. When I got into the format in highschool, the best and most established players, the guys I looked up to, would show off the Survival of the Fittests and Tropical Islands in their binders. The current incoming group of players I see don't know anyone who owns Survival or ABURs.
The starkness of this difference means, to me, that once a tipping point is reached it will be precipitous.