>Secondly, if they can do 14RPM with current eink displays
They can't. Anyone claiming otherwise is misrepresenting tricks as actual refresh rate. You can convincingly fake higher refreshes by e.g. refreshing pixels independently, but any given pixel can't be refreshed at 14RPM, not even close.
First of all, you can't tell me what I can and cannot do.
Secondly, if they can do 14RPM with current eink displays, then 24RPM is not very far fetched.