Yes, and it's not as if tools like Google's Lighthouse/PageSpeedInsights or Mozilla's Firefox Profiler haven't been available for years. Economists and lawmake

Yes, and it's not as if tools like Google's Lighthouse/PageSpeedInsights or Mozilla's Firefox Profiler haven't been available for years. Economists and lawmakers have determined that the economic benefits of personalization accrue to the ad middlemen like Google, not to the publishers who have to encumber their sites with all the surveillance beacons, but the reality of the market is publishers have no leverage. That said, most of those beacons are set with the async/defer attribute and should not have a measurable on page load speed.