Yes. The question is, was Einstein's work the final word that we will ever hear on the matter?

When I look at the progress of science over the past 1,000 years or so, let alone the past 300, I would have to say....I doubt it.

I feel reasonably sure that Einstein's theories will presently be modified and changed by further theories. We cannot long rest on our laurels. There will always be further developments and surprises waiting.