A lot of cameras can sheet (and store) both raw and jpeg concurrently.
According to a pro I know, the name of the game today is to edit from raw but in a manner which always retains the original file as a base layer. I don't know what tools he uses though...
The difference between raw and jpeg becomes smaller as one goes more upmarket, and as the lighting conditions get better. A lot of the time, with a decent DSLR, the difference is virtually invisible in the end image. But there is always a big difference if you are doing substantial image adjustments. In aviation, these are not uncommon, to e.g. take out haze which sometimes needs a lot of work.