Completely agree.
The only reason the relative had it at all was because of those old fears. As soon as I learned that they had it bundled with the computer (hate that. Malware's gotta get in somewhere though I guess), I knew why it was being slow.
I hold this up as an example because even their own troubleshooting website and a program dedicated to the purpose above and beyond the usual uninstaller couldn't do it though. Avast doesn't even know its own malware.
Also this nonsense got me the chance to put mint on their computer, but the "switch to Linux" argument isn't constructive in this particular spot. They didn't end up sticking to it because a required-for-school piece of software for tests just doesn't do Linux at all. Couldn't get it to run in wine or even a virtual machine either, and they're not great at the whole computer thing so I didn't wanna be tech support for dual booting.
Typewriters.
They had bars that needed to physically move, and so staggering them helped them not collide and get jammed.
If you imagine a bar coming from the center of each key towards your screen, you can see how the staggering was helpful. For instance, M misses J and K above it, naturally, but it also slightly misses I and the 8 above that.
It's a great solution for a nonexistent problem in keyboards.