Yes. 1TB SSDs can be bought new for 50€, 500GB for even less. For some people this is expensive depending in the region (e.g. I also know someone who uses an HDD). But given the price of other pc parts it isn’t something to cheap out on (a 1TB/2TB HDD is also 50€).
It’s difficult to know how much of a difference it makes, but I also think it’s at least a reason. Given Nintendo is also going after sites like Vimm’s Lair, which does not host recent consoles ROMs, it’s not the only reason.