Relativity is notorious for singularities. Although they have been seized upon as cult objects by Big Bangers and Black Holers, Arp puts singularities in their true perspective. In Narlikar's theory, relativity's singularities are abolished. Narlikar's theory also abolishes curved space, that trademark of relativity, cliche of science fiction, and nemesis of all who attempt to visualize it. The fact that a single fundamental change leads to flat space-time is very promising for the essential correctness of Narlikar's theory.
Curved space is epistemologically untenable, a fudge.
It arises from the use of squidgy measuring sticks. A correct theory must have flat space and uniform time. Another hopeful sign is that Narlikar's theory predicts a stable universe. Relativity and Newton's theory of gravitation share the flaw of predicting that matter in a static universe governed by gravitation would fall in a heap. Both are hopeless doctrines for an eternal universe, which shows that these theories can't be extrapolated to the whole universe.