[braunboffel]

> I always saw the problem as: only one company or limited companies can manufacture them.

That is a really odd assumption. There are multiple companies making electrophoretic displays and multiple different technologies, of which only one is really commercially effective so far in a very limited niche space. Why don't you think physics is the limitation? I mean, don't you think above would be the equivalent of me saying that the reason we don't have daily flights to Mars is because SpaceX is the only manufacturer of Falcon Heavy.

[MichaelZuo]

Probably the parent simply doesn't have a solid grasp of physics, hence is unable to think of that limitation.

A surprisingly large fraction of seemingly intelligent, educated, and otherwise decent folks have no clue beyond a superficial understanding. Even though superficial appearances may suggest that they would be smart enough to figure out what they do and do not know.