The so-called "head-of-line blocking" problem seems to be restricted to "complex" websites that use resources from multiple hosts, especially trackers and ad se

The so-called "head-of-line blocking" problem seems to be restricted to "complex" websites that use resources from multiple hosts, especially trackers and ad servers. Those are often websites with lots of advertising, distractions and annoyances. Huh, what? The resources from different hosts are on different HTTP/1.1 connections, so they cannot head-of-line block one another.