Regardless, I dont know that now is the time for more than 60 cards, but I do know that as the card pool expands, it gets easier and easier to find more spells of a similar power level, but no other lands are close to the power level of fetchlands, so the incentives to build to maximize the power of our lands over the power of our spells do increase in some way over time, which is to say that, even if its not right now, it could be someday, and getting there first might be the best way to truly break Modern.
Finding a Buyer at the "Right" Price Graded cards are extremely illiquid
Forced Combat Force opponents' creatures to attack each other using the goad mechanic
Gardevoir ex is a collector's dream and a player's secret weapon
You can only use this effect of "Predaplant Chlamydosundew" once per turn
And they make it imperative that you have both tokens and dice to represent whats going on, or else nothing will make any sense