Kant's Categories Were Mile Markers for Cognition

 I don't know of a better schema than the posteriori, a priori and synthetic a priori. It's just a stage on life’s philosophical way of developing understanding of mind and its place in nature. With quantum mechanics knowledge and the Higgs field basically affirming Kant’s position on the noumenon Kant’s outlook remains solid enough. It doesn’t preclude Platonic realism concerning forms and theories about how quanta are configured; yet no one understands the deepest layers of space-time these days.

People speculate about what supports the quantum entanglement Universe phenomena in four dimensions and it is just theory. String theorists proposed 11 dimensions with just four manifested yet it seems more logical that just two dimensions underlie the Universe of entanglement and the doubling of dimensions is an emergent phenomenon of entanglement. It is popular these days to use the Plank length as a mystic limit below which marvelous things such as a Multiverse occurs with very tiny people of angelic disposition living as it were, on the head of pins, yet the limits of verification are obvious- the right answer could be just two dimensions and then nothingness from which something emerged with the Word of God.

Schopenhauer attempted to continue Kant's work in The Fourfold Roots of Reason with a more physicalist approach and though it starts out brilliantly and narcissistically, it peters out with theories about the eye and optics.

Plato’s realism could be reverse engineered in a way from Aristotle's classifications and categories maybe. Sorting forms of things perceived into categories of forms that break down in the temporal implicitly leads to a theory of forms that don’t break down. That reminds me of atomic structure theories and the Pauli exclusion principle that just one electron can be in an orbit and if two, one must have an opposite spin. 

Kant’s work was great for a couple of centuries ago. People have advanced the realm of knowledge, theory and uncertainty since. Like the thousands of people that have tried to disprove Descartes’ Meditations they might develop instead a better appreciation of the contribution and not try to put new wine into old wineskins.