Your video player “can” account for latency if you configure it correctly which I imagine the majority of people don’t do, and simply put up with it. Ditto with your music playback always lagging 1-2 seconds behind your control inputs. I have never used a media player on any platform that automatically figured out audio latency. Maybe the iDevices do if you pair them with Airpods, I don’t know; I don’t own anything Apple and I never will.
It also matters for music production, and makes life a lot more pleasant for audio/video editing. Plus, latency is just annoying in any setting.
All true, but I am going to be that nerd and point out that there were indeed commercial devices with lithium ion battery packs in them in the mid to late '90s, especially so in the late '90s. By 2000-2001 you couldn’t escape the damn things in cameras, disc players, PDAs, etc. So yes, it did take relatively forever for the technology to become commercially ubiquitous, but not that long. (And yes, the first couple of waves of Li-Ion batteries were indeed crap, and had all of us geeks clamoring for gadgets that still took AA’s for a while.)