After Newton's death it literally tool the best mathematicians in the world a century to assimilate his work on Calculus. Leibniz might disagree with you.
On the other hand, the same might be said about Einstein's work. Einstein's Relativity was quickly *accepted*, but its full implications are still being grappled with 80+ years later.
Einstein took Lorentz transformation and put it in a physics aspect to come up with his relativity theory. Without Lorentz there will not be a relativity theory.