I don't know, one thing I like about Legacy is that players are really attached to their decks and the format. In Modern it isn't like this, the decks are ugly and players play them just because they win. I'm pretty young (19 yo) but I managed to save money and spend it to build Legacy decks and I have almost 4 completed decks, so if it was possible for me it could be possible for others. I think the only problem is the limited print run of some cards of the first expansions, but for now it shouldn't be a concern since on mkm the card availability is high