When you are drilling new keys but you absolutely do not want to look at the layout map that shows the keys you are supposed to know already.
I’m really enjoying learning it so far. Semimak sounds really interesting. I think what I take away from reading about alt layouts is, beyond a certain point, you need to start to understand the dexterity and capability of your own fingers because metrics won’t tell you much more than the very basics of what a layout can do.