However, a few things have changed over the last several years that have led to Paradigm Shift actually seeing play in every format its legal in the printing of two very good cards that have alternate win conditions tied to you shrinking your library or erasing it entirely
The self-life loss was supposed to be the balancing point, but in practice it helped the deck access resources while still forcing opponents to deal with a huge leader body and some of the best red tools available at the time
Ramp shells, Tron builds, and Commander decks built around big-mana engines all benefit from having a reset button that sticks around afterward
The standard hit rates for Illustration Rares and Special Illustration Rares might even out over a large sample size, but since you can't guarantee loose packs will be packaged in order, you could open several packs without a hit
Plus, doing the sixth color in a set like Planar Chaos had the advantage of giving us the perfect excuse to stop immediately afterwards