I think most top tech IT shops' dev teams do all their development locally (on huge iron) and don't really take into account latencies over the public internet

I think most top tech IT shops' dev teams do all their development locally (on huge iron) and don't really take into account latencies over the public internet and this has all kinds of implications for usability, to say nothing of the fact that all the big tech website are almost completely aloof to user preferences and are more interested in tracking usage metrics to feed machine learning telemetry gathering.