The ppt in the blog is from the 2024 report - https://docsend.com/view/zqgfupfzyud499hn. The India 1-2-3 framework is old though. IIRC it was coined by a retail sector founder (Kishore Biyani) in the 2000s.
Also Koramangala, HSR layout are also the more affluent localities in Bengaluru.