Missing the Point on Borges

I was reading a book on Borges that purported to connect him to the European avant-garde. The problem was that it kind of missed the point by construing the question in very narrow terms: his engagement with ultraísmo. Surely the point is not that he retained his ultraísmo later, but that he found his own way to be avant-garde, a way that seemed, in some ways, hostile to the avant-garde itself. There is an interesting paradox here, but one completely invisible to the typical Hispanist.