Latency definitely antagonizes users to the point of reducing use, and from what I can tell very few tech company PMs are “competent” at keeping latency of thei

Latency definitely antagonizes users to the point of reducing use, and from what I can tell very few tech company PMs are “competent” at keeping latency of their apps/websites down, when faced with competing pressures like shipping new features, rearranging everything in the UI, switching front-end rendering strategy, gathering increasing amounts of invasive analytic data, or cramming more ads in. Certainly not the ones at Facebook, Google, etc. Nobody gets promoted for “we shipped less new features but our latency remained constant”, or “we shipped less new features but reduced device battery use by 10%”.