We've pushed all of the starter decks from those sets to the bottom of our rankings, because they're not a suitable way to start playing Lorcana's main format
Death and Taxes, Azorius Control, and Stoneblade variants should all be looking to find a spot for Solitude in their lists, as it can dismantle some powerful starts out of Prowess, Zoo, and Deaths Shadow
Occasionally, these side sets will also be relevant for competitive players, as there are still beneficial cards in them
This means that if your only Pokmon in play capable of evolving is Arctibax, but Baxcalibur is in the discard pile (a public zone), you cant play Evosoda (or search your deck with a similar effect) and this could sometimes be important in situations where you need to thin your hand down in order to draw more cards with an Ability, or play a Supporter like Archies Ace in the Hole
Even the Gold Rare cards, which are supposed to be the rarest cards in a set, typically sell for less than their Special Illustration Rare counterparts