TidBITS:

Have you ever wondered why, if Dark Mode is such a revelation, it took Apple 35 years after the first Macintosh to revert to the look of the light-on-dark CRT-based monitors of the Apple ][ and IBM PC era? Were those green-on-black and amber-on-black screens really so wonderful?

No, they weren’t, and one of the Mac’s most significant design decisions back in 1984 was an interface that put black text and graphics on a white screen, just as had been done in books for hundreds of years.