A well designed car and proper driving technique make a backup camera unnecessary.

Many old cars have excellent rewards visibility without needing any camera- no camera will compare to a first generation Porsche Boxster with the top down for example, where you can directly see behind you by looking back. Volvo wagons are great like that also.

I also, as a rule never back anywhere that I haven’t seen directly just a few seconds before. I always back into parking places so I can see them facing forwards and not back up when starting out, and if I do need to back up when starting out I walk behind the car and look around first and then immediately get in and back up.