My country has new rule about minimal square space per employee. Capacity of our office is now reduced to 20%. 80% employees have to work from home, they do not fit into our office.

If this rule is permanent, companies may not be able to afford office space. WFH may become "new normal" bcos it is only thing company can afford.

In old days, flu spread in office like wild fire. Companies outsourced negative externalities (sick leave and sick holidays) to their employees. Now we have way more transmissible viruses and probably new regulations.