I don't even know if this is an AI thing. I've worked at places that have varying levels of operational maturity, and some of the ones that had very old SRE orgs also had a lot of their SREs operating mostly in the tier 3 given by the article.

One of these orgs had basically all of the noisy pages under control through automated remediation and a culture that pushed towards aggressive automation of pages that had the same root causes. Almost everything I was paged for was some novel or uncommon fault condition. Developing an intuition about how the system worked (well, more specifically, how the system failed) took a lot longer because most things I had to look at were some edge case failure.