Snap_on ratcheting screwdriver/bit driver here (well--several of them). LOL
If you work with a LOT of fasteners daily, I prefer the ratcheting for ease of use and speed, and the bits due to the fact that over time they do indeed wear out and are consumeables and thus replaceable (and far easier to replace than warrantying each screwdriver itself). It's also nice to have a large variety of bits as that precludes the need to carry multiple sets of various drivers ( flat blade, phillips, torx, etc.)all with handles thus repetitive. The magnetic bit holder tips also hold screws so that is a big plus too.
The drawback to bit drivers is there are many places where the bit driver shanks are too wide to reach into areas such as recessed screws or a lot of recessed or hard to reach fasteners on automobiles.
Thus, you really do need both.
