Remember one of the alternatives to MTGA is Magic Online where you do buy cards, but that comparison is its own discussion
6 Tetsuo, Imperial Champion A creature that truly embodies the idea of weapon mastery associated with Samurai, Tetsuo offers a choice of two excellent effects whenever he swings in with a piece of equipment in his hands
At lower power levels, stuff like Striped Riverwinder that can just cycle is also good at offering some cross-archetype playability
A prominent example is the "Voltron" strategy, when the deck casts its commander and loads it up with powerful equipment and aura cards to create an unstoppable attacker
One of the main arguments I see is that since Magic has already expanded beyond its own limits with novels, comics, video games (remember Magic Legends
This dynamic effect leads to more interesting gameplay