Much of the Special Relativity value was on Lorenz mechanics anyway.
And General Relativity, the Photoelectric Effect explanation, and his explanation for the Brownian movement all needed a great deal of anti-establishment thinking… honestly, I have no idea how much Newton had of that.
General Relativity needed lots and lots of the math that has been developed after Newton, even shortly before Einstein (and also he himself has developed some of it).
Much of the Special Relativity value was on Lorenz mechanics anyway.
And General Relativity, the Photoelectric Effect explanation, and his explanation for the Brownian movement all needed a great deal of anti-establishment thinking… honestly, I have no idea how much Newton had of that.
General Relativity needed lots and lots of the math that has been developed after Newton, even shortly before Einstein (and also he himself has developed some of it).