Comment by robrtsql
2 months ago
There are indeed formats which work this way (https://canadianhighlander.ca/points-list/), but unfortunately the most-played formats (Commander, Standard, Modern..) don't have any such restrictions which means the investment required for competitive play is prohibitively high.
On the other hand, the ridiculous costs mean it's very easy to find like-minded people to play casually with using bootleg cards.
Even canadian highlander is barely an example. That list is pretty small and for most decks it's only blocking a couple cards from being included. A typical deck is around 60% rares.