Earlier quoted context omitted.
> My friggin circa 1984 Mac Plus felt faster on most stuff than the generic desktop PC You do have some merit to the argument, but your 1984 Mac didn't have half as "pretty" UI, and that matters to some people. It didn't do dynamic language processing to figure out if you've made a grammatical error. It did not have to continuously scan every data stream for malware. It did not have to use a significantly restricted…
So why have a full pretty UI at the cost of latency? If the latency begins to cross a threshold and begins to be inconvenient or distracting, it is time to step and think that may be the pretty UI is too ahead of its time, and we should stop making the UI prettier than it can be at this time.
I have to add that most computer I see of my friends are extremely snappy, I don't really see what you are talking about.