Generally speaking, all sorts of cards are available for reproduction whether for employment, business or personal matters depending on how these are used and made
Legendary artifacts and equipment from Magics past are now eligible commanders, opening up hundreds of new deck building possibilities
Okay, sure, theres technically a difference between Pearl-Ear, Imperial Advisor and something like Kor Spiritdancer, but its the same as the difference between Tatyova, Benthic Druid and Omnath, Locus of the Roil: it wont matter for the vast majority of the game states youre going to find yourself in
What percentage of games actually lasted more than a turn or two after a Primeval Titan resolved
Few who bought these early versions of the cards thought to keep them in pristine condition, and this has created the perfect storm, leading to increased collectible value of these first prints in the secondary marketplace