For most modern guys, yes, but there are still a lot of other uses for a hammer. Whether it's just not worth it to break out the nailer, or light demolition, or aligning framing elements, etc. Personally, since I moved into my property a few years ago, I frame about 50 linear feet per year, which is next to nothing, and I still preemptively went out and bought an electric nailer. No clue how the old school guys did it and maintained feeling in their arm.