@mhoye if you think it's bad now, the next generation is ads built in to the browser, with an average latency of 1500ms per ad (!) https://www.adexchanger.com/the-sell-sider/privacy-sandboxs-latency-issues-will-cost-publishers/
it helps to understand the direction here if you consider Web Environment Integrity*, Manifest v3, "Privacy Sandbox" (in-browser ads), and "Performance Max" (hide placements from advertisers) as 1 project...goal is to get the most expensive ads possible into the cheapest possible context
(and yes, WEI will be back under a different name)