That's because you should've fixed the foundation instead.

For example,

> I frequently opened this by running q: instead of :q, and didn’t know what I had done. Now I know:

But you still haven't fixed the typo-prone keybinds! And you still haven't set up a way to get this information so that next time something unexpected happens you can open your log of commands and see exactly what you've done and decide on the spot if you need to fix it. So you'd need to wait for the next chapter of the "let's read all the manuals" quest to when discover the issue

> Digraphs are an obscure feature for typing obscure characters. For example, you can enter “½” in Insert mode with CTRL-K 1 2. There’s a big list in :digraphs. I don’t use this much, except for typing fractions, but I use this more than I thought I would.

Of course, why would you commit that big list of obscure chars to memory??? The proper interface would be an avoidable visual feedback character picker so that if yo don't remember the "1 2" sequence you can even search for "fractions" But at this point, why bother with a bad vim component when you can invest in a more general symbol input solution and use it in vim and everywhere else.