Not really. Newtons calculus,root finding, and fundamental laws still have massive useage and importance
There is no such thing as free energy
That was part of Maxwell’s equations. It was one that was discarded by Oliver Heavyside because like the other 196 he considered ‘abominations’ because they were field equations not his familiar vector equations. The four he kept he converted from field to vector thus giving all we know about the electromagnetic spectrum and created the path for modern civilization.
Point is that Maxwell showed that there is more to existence than just the electromagnetic spectrum we are familiar with ... free energy is all around us (light, and gamma rays, etc) but we know of no way to harness it which is were the discarded 196 field equations come in.
Newton’s stuff was only baby steps; Maxwell stuff was the heavy lifting.