Vaguely explained how version 1 & 2, 3 & 5, work then says version 4 is what you probably want, but doesn’t explain how and kind of why. It feels like a cliffh

Vaguely explained how version 1 & 2, 3 & 5, work then says version 4 is what you probably want, but doesn’t explain how and kind of why. It feels like a cliffhanger.