Anecdotally, I see tons of cards from the Wizards of the Coast sets before the e-Card Series, but hardly ever run across even common from Expedition, Aquapolis, or Skyridge
Shoal Cycle (Blazing, Disrupting, Nourishing, Shining) I would say 80% of the Shoal cycle was playable at one point or another
Afterward, they were divided into three categories: Item, Stadium, and Supporter
This means that older cards can suddenly become valuable again if they synergise with newer strategies
Despite only being a Level two monster, this made it perfect for getting those precise numbers needed to get a Synchro Monster with more than two necessary materials
If youre in Red, theres no reason not to run Hanweir Battlements and Flamekin Village