The nice thing about that abstraction is that instead of telling the player, Here is what is happening, they get to bridge that gap. For the game industry, its hoped for as a potential blockbuster
Of course, the developers could quite easily make room for more expansions if they really wanted to, so it's possible that old packs will end up being available indefinitely, or, at the very least cycled in and out alongside some of the newer Pokemon TCG Pocket expansions
This is particularly egregious considering how much value was packed into the original Deadpool Secret Lair drop
If your sideboard is full of creatures you can put them all down, or if you're playing kitchen table with friends you can just throw your entire collection down for good measure
Before the printing of Modern Horizons 2, Torch of Defiance was even seeing play in a handful of Modern decks