Smartphone keyboards dynamically adjust the "hitbox" of each key based on what's previously been typed and overall letter frequencies of the language. So when typing "Paris is the capital of Fr..." [*], the A key becomes much easier to hit than its neighbors. Fun fact: back in the day, when this tech was less refined, certain letter contexts made the hitboxes of some keys effectively nonexistent [0].
I wonder if an approach like KKeyboard with larger but statically combined keys leads to faster typing than the current approach with smaller but dynamically "combined" keys.
[*] In reality, the context is modeled using a simple Hidden Markov Model with a much smaller effective context window that could not associate "Paris" and "France." But you get the idea.
[0] https://forums.macrumors.com/threads/impossible-to-type-okee...
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