It still frustrates me that e.g. text editors can't get the basics like a latency between a key press and character appearing on the screen.
My latest Ryzen can't compete with C64 in that regard.
Some of that isn't the text editors fault. With the C64 the keystroke may be on the screen before it out of the USB stack on a modern computer. That is even before you start to consider the latency in the video stack. As John Carmack once noted: "I can send an IP packet to Europe faster than I can send a pixel to the screen. How f’d up is that?" -- https://twitter.com/id_aa_carmack/status/193480622533120001