The anticipation of what your opponent will play based on experience and knowledge of the current pool of tournament-legal cards is the so-called metagame the game outside the game (cue Inception music)
Farhaven Elf has finally been more or less outmoded, and its by a leafy T-Rex
For example, if you sort by alphabetical, your favorite decks will be sorted alphabetically, followed by the rest of the decks in your collection (also in alphabetical order, of course): Last Played will sort all your decks based on how recently the deck has been played, starting with the most recent and going backwards from there
Cards like Sun Titan are ideal for this plan, as you can use them to accrue significant value over time through creatures like Eternal Witness, Loyal Retainers, and Wood Elves, fetchlands like Bloodstained Mire, or even previously destroyed mana rocks, so having a big creature or two that can fill this role is very helpful when possible
it is a cultural phenomenon, bringing friends together and sparking endless debates over strategies and collections