Conversation so far:
Can you provide me with a little more information on Confield, Draft 7.30 by Autechre? What happened?
The eleventh studio album entitled Exai was released on 5 March 2013 The new millennium brought about a drastic change in Autechre's style, demonstrated by Confield and Draft 7.30
When you say The new millennium brought about a drastic change in Autechre's style, was it a positive or negative change?
The reactions by both professional critics and fans to the release of Autechre's Confield were mixed, though generally positive.

Question: What lead to the drastic change?
Self-contained rewrite: What lead to the drastic change in Autechre's style?