Matrix retelling the beliefs of plato
In conclusion, I think that The Matrix does used Plato's simile of the line and Plato's cave as a main concept in making this film.
For example, The matrix is a fake reality that everybody in it don't know that is fake just like the cavemen with the shadows.
It uses the simile of the line during the end of the film. Where Neo was able to read the coding. This indirectly means that he has achieve the form and is on THE GOOD in the simile of line.