Regarding the broader question of the significance of relativity, quantum mechanics, and quantum field theory, it's important to note that these frameworks remain fundamental and influential in our understanding of the physical world. Relativity, specifically the theories of special relativity and general relativity, describe the behavior of objects at high speeds or in the presence of strong gravitational fields.
Quantum mechanics, on the other hand, provides a framework for understanding the behavior of particles at the microscopic scale, where classical physics breaks down. It is a highly successful theory that has been extensively tested and applied in various areas of physics.
Quantum field theory combines the principles of quantum mechanics and special relativity to describe the behavior of quantum fields, which are associated with particles. It is the theoretical framework used to understand the fundamental forces and particles of the Standard Model of particle physics.
These theories have been successful in explaining and predicting a wide range of phenomena and have withstood rigorous experimental testing. While scientific theories and equations may be refined and modified over time to incorporate new discoveries and address theoretical shortcomings, the core principles and frameworks of relativity, quantum mechanics, and quantum field theory remain highly meaningful and foundational in our understanding of the physical universe.