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Outside of a few very specific cards (which will be mentioned first) that require deck sizes above the minimum, all the other reasons you might want to are more fitting to casual magic: Battle of Wits - A win condition that specifically requires you to have more than 3 times the minimum deck size left in your deck to win means starting with about 4 times that minimum, if not more

I have also found a number of examples for more modern sets which will be discussed here in due time

Amazon.com: Salazzle GX - 25/147 - Ultra Rare : Toys & Games

I preferred the new name to its placeholder original

There are ways which stolen cards can be tracked