IMO,,

A BoB can be used for both. To me, it provides the basic essentials to get yourself to a "normal area" or to a "Bug Out Location" such as a camp, where supplies are either available or cached.

I carry a full TP roll in each of my BoB's (home & work) and I have my shaving kit with me always. My shaving kit, medicine/vitamins/FAK are always with me and attach to the outside of my BoB w/carabiners.

The home BoB has 4 days of rations and more equipment than my work BoB.

The work BoB has 10 days of rations and less equipment. It also has more VFR charts to get me home from wherever I am when the SHTF.