It seems to be a common view among phycisists that SR someone else would have come up with sooner or later (probably sooner), but GR required a critical insight so rare that had Einstein not existed, we might still not have an adequate theory of gravitation.
Once David Hilbert became aware of the problem, he almost beat Einstein to the punch.
ETA: Actually, looking at the history, it seems that Hilbert’s interest in physics and mathematical prowess is not evidence that he could have come up with the necessary physical insight. He didn’t become interested in GR until well after Einstein had laid the groundwork.
It seems to be a common view among phycisists that SR someone else would have come up with sooner or later (probably sooner), but GR required a critical insight so rare that had Einstein not existed, we might still not have an adequate theory of gravitation.
Once David Hilbert became aware of the problem, he almost beat Einstein to the punch.
ETA: Actually, looking at the history, it seems that Hilbert’s interest in physics and mathematical prowess is not evidence that he could have come up with the necessary physical insight. He didn’t become interested in GR until well after Einstein had laid the groundwork.