While having Pauper, Modern, Vintage and Legacy (often with both competitive and friendly options) along with several limited events, PTQ's and format challenges is great for established players, for a new player who is just learning the game it's just another layer of confusion, and confusion for no real gain since new players aren't going to jump into 90% of the queues anyway
One-shot effects, like Riveteers ConfluenceRiveteers Confluence and RestoreRestore, are more cost-effective but have no further value afterward
Or if you have all of these, see the full list of Mythical Island cards, Space-Time Expansion cards, and Triumphant Light cards
The most obvious example of this is First Edition cards
Magic Origins (2015) The second (and current) overall frame change was unveiled in Magic Origins