Why not [blah](bloo)? Why not __floo flah__? There’s always some other idea that people want to argue.

We had reasons. We already had clean syntax for [https://uri text description] and [https://uri] for numbered citations as footnotes and [#anchor] for named anchors that fit this format of square brackets for everything.

The double square brackets made it clear the inner tokens were not to be parsed at all but were the link itself. Plus they are fast to type and very easy to identify (they look like a [[button]]) and read cleanly as part of a sentence.