> 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.
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.
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.