The top camera makers, Nikon and Canon, were top camera makers before digital. Smartphones killed the compact cameras market that had the most companies and the survivors are the ones that had successful interchangable lens systems or were able to pivot to mirrorless.

Sony is the other currently successful camera maker. They bought Konica-Minolta, and made the switch to mirrorless early. Most importantly, they manufacture the best sensors that everyone else except for Canon uses.

Most of the current digital camera brands were analog camera makers. Panasonic is the exception and they partnered with Leica.