Cassius but here is the critical difference, the thing Epicurus definitely would not be doing, and I don't think I explained it sufficiently or you wouldn't disagree lol. Epicurus would _not_:
1) Have to get people interested in a prior historical figure no longer present and argue with them over what that person meant;
2) Have to get people to figure out what people hundreds of years ago thought about physics, compared to current research.
Those are the two major barriers, as I see it, to folks getting specifically interested in Epicurus-- and if they do get interested, these are barriers to understanding his philosophy.
Epicurus in his time had the benefit of being able to explain the philosophy directly, using current observations. I have no reason to think he wouldn't do the same today-- using all the current science at hand. That is the way I think people today could learn it... but the historical and physics issues are a substantial barrier to practicing and teaching it the way Epicurus did.