Employees recovering from serious illness might be able to work during recuperative period. Because employees are more isolated, they are less likely to spread or contract contagious diseases such as flu, colds, viruses, etc.
Employees are generally in better health because of reduced stress and exposure to pollution.
Employees are less likely to be injured while commuting. Less time taken off due to family crisis. Less productivity loss due to early wind down towards the end of the work day as employees mentally start to prepare to leave and clear their desks. Flexible working is more appealing to well educated graduates, so they are less likely to switch jobs as freely. Maternity and medical related incidents will result in less staff leaving employment because they can work almost right up to and much sooner after the event.