For me it was the combination of burn-out from trying to get "good" at MTG while best results being top eight in GPQs, PTQs, and perhaps day two in GPs, and the focus on EDH. Tried dipping my toe in last year and just being overwhelmed by the insane amount of product. Even within the same set. For me part of the fun was "solving" the limited formats for each set. But now draft is its own boosters?