If you get it right, theres money to be made, with even outsiders to the game picking up Reserved Lists cards as part of their portfolio
Steady Tortoise // Harried Dash Creature Turtle // Sorcery Adventure Steady Tortoise Creature Turtle Ward Whenever you attack, Steady Tortoise perpetually gets +1/+1
Beyond their sentimental, aesthetic, and financial value, many are also perfectly playable in a strong Pokmon deck
Jeska, Thrice Reborn [Best Damage Multiplier Commander] Jeska, Thrice Reborn pushes games toward fast conclusions by amplifying damage from a single source
Garruk, Apex Predator Garruk, Apex Predator is one of the best Garruk planeswalkers because it outright destroys another planeswalker with one of its plus abilities
And in some postboard games, for example white was more important because you had to resolve Portable Hole or Wear to answer the opponents hate cards