On memorizing: for me, it hasn't been difficult. Specialty layer switches are placed on keys that are difficult to press so I don't accidentally hit them. Addit

On memorizing: for me, it hasn't been difficult. Specialty layer switches are placed on keys that are difficult to press so I don't accidentally hit them. Additionally, since they're out of the way, it's easy to remember them because of the difficulty. For more common layer switches, I extensively use dual-use keys. For example, if I tap "F" then I get the letter "f" but if I hold it, it switches to a vim-like layer. HJKL becomes arrow keys, Y becomes Ctrl+C, etc. The point is that you don't have to dedicate more keys to do layer switching. You can have the same key do different things depending on how it's used. For me, memorizing has been easy due to incremental change. I didn't come up with my new layout on day one then stick to it forever. I'd find a frequent pain point, tweak the layout, and memorize the tweak. It's easy to remember 2 or 3 key changes at a time.