I think you are just paraphrasing his point, so don't take this as a shot in your direction, but anybody who remembers computers 20 years ago being faster either has some serious rose tinted glasses, or was not using computers 20 years ago. They were incredibly buggy and slow. Basic users crashed their Windows boxes often enough that "blue screen of death" was a common phrase (which is to say, we're advanced users here -- we can even get Linux to crash -- but normal computers are pretty good nowadays if you just use them like a normal person).
If they felt faster, that's because we were using a text editors rather than office suites, because we didn't want to wait minutes for an office suite to start up (and then crash). You can still use a text editor and vim at least is still pretty snappy.
Like surely we can all remember the first solid state drives we installed, right? The feeling of not waiting for programs to load was remarkable. Now we're just used to having programs start instantly.
Things are actually quite good, we're just used to it.
I mean, the internet is kind of a mixed bag. Javascript is annoying and everywhere. But on the other hand, remember when Java applets were a thing?