[1] (3.1.1) Apps and their metadata may not include buttons, external links, or other calls to action that direct customers to purchasing mechanisms other than in-app purchase, except as set forth in 3.1.3(a). https://developer.apple.com/app-store/review/guidelines/#bus...
Between when the case was decided and now, Apple has been appealing, as is their right. They have one level left to appeal to. Litigation takes time. this is actually pretty quick in relative terms. Certainly no Jarndyce and Jarndyce.
IIRC Apple was forced to allow this for dating apps in the Netherlands - but they still charge a 27% commission anyway.
Which is to be expected - the fee is a platform commission which is largely unrelated to the cost of transaction processing.