> The biggest downside to jk/kj mapping is that words that end with k are somewhat common. So a few times a week I will type something like "splunk" and want to exit insert mode immediately so I mash jk/kj after the k. 50% of the time the j is first so I end up with "splun" (kj is <esc>) (k moves up since we're in normal mode now).

This is why I use `jj` instead of `jk`/`kj` -- as a native English speaker in a job where everyone primarily speaks English, there are few cases where I'd be writing code with a `jj` naturally in a string.