Comment by the__alchemist

This is my understanding as well. What the article described has been cannon for almost a century, but it may not be an accurate representation, and we still don't have the answers to address Einsteins' concerns.

(Article quote in question: "But toward the tail end of Einstein’s life, he argued strenuously against the concepts undergirding the emerging field of quantum mechanics, the ideas that are shaking up physics yet again and may lay bare even more of our universe’s mysteries.")