The business just can function at a diminished capacity.
E.g. the team which had 5 developers now has 4.
If you're in a more singular position (manager etc.), then the entire's department workload can be rearranged so that your work falls onto one or multiple of your colleagues while you're gone. Since apparently most bigger orgs are in constant flux, it's not hard to do.
Also, since it's the norm that people disappear for long periods of time, businesses can hire with some slack (e.g. hire 110% of needed capacity) to easily absorb absences.
If you're in a more singular position (manager etc.), then the entire's department workload can be rearranged so that your work falls onto one or multiple of your colleagues while you're gone. Since apparently most bigger orgs are in constant flux, it's not hard to do.
Also, since it's the norm that people disappear for long periods of time, businesses can hire with some slack (e.g. hire 110% of needed capacity) to easily absorb absences.