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I guess it depends whether you want to write about playing blackjack with Dijkstra in Reykjavik!

I might need to try it out for a bit. It has the nice feature that if you press it in normal mode there's usually no effect.

Unless you type a lot of graph algorithms notes (and have to write "Dijkstra"), you rarely encounter the key sequence jk. It makes it easier to work with vim and never move to hit the Esc key.

That or you're writing in Dutch. Neither of ij, jk or even kj work in Dutch, because they are very common.

That's a very fair point! I hadn't considered this at all, I mostly write in English, and subconsciously assumed this would be true of most Vim users.

I use it and love it, even after binding Caps Lock to Esc.

The only issue I have is when I type something that ends with j or k and immediately want to exit insert mode. e.g. if I type "ack" and then mash jk to leave insert mode. Sometimes the j will hit first and only "ac" is left in the buffer.

That happens rarely though, and sometimes now I'll know it's going to happen and consciously type "ackkj" or just pause a beat to ensure the right thing happens.