I'm not sure you understood, in that example if a person wants a fast DSLR and a film camera, an in-between system may not really make sense as an all-in one replacement. You should try and specialize.
Also, as times change different things are expected. Just because people could do something 20, 50 or 150 years ago, doesn't mean that you should do it today, photographers had always used the most advanced technology available to them at any point in time. Long ago people had no choice but to shoot manual film cameras, but they were the most advanced of their kind at the time, one day people will look back at what we have now and say "how did they ever get anything done with that junk?".