To put that in context, the new MicroSD Express cards that work with the Nintendo Switch 2 top out at a theoretical 985MB/s, less than a third the speed. And while a full-size SD Express card could theoretically beat Mini SSD at 3,940MB/s, it would be nearly twice the size of Biwin’s creation.
From the article:
So: because it’s smaller.
Why would you read the article when you could just complain in the comments?