COVID 19 - Twitter Will Allow Employees To Work From Home "Forever" - challenges and opportunities?

Twitter said Tuesday it is unlikely to open its offices before September, and that many of its employees will be permitted to work from home permanently even after the end of the coronavirus lockdowns.
"We were uniquely positioned to respond quickly and allow folks to work from home given our emphasis on decentralization and supporting a distributed workforce capable of working from anywhere," a Twitter spokesperson said.
This is clearly becoming the trend and presents both unique challenges and opportunities.
Can members please try to list them out as per their experience so everyone has a clearer view.

This is a good move by the company and creating platform for "Work from Home" before September, keeping view such conditions that business should not come to stand still.
But all business units are not lucky enough to adopt ' Work From Home' since it is not a viable and feasible proposition.

This is another news I got today. It's forward. Normally I do not give much attention to any forward but this is in context with current subject matter, I remembered it and though of copy paste here. It's really frightening one.

Google and Facebook announced that they will not have any offices until 2021. All that the employees need to work upon is internet. In this way, they will save 1 million dollars as rent every month and employees will save 2000 dollars rent every month for apartment for being closer to office. Also, they will pick up TALENT from across the world from any countries because of remote working. Salary scales will drop and people will stop migrating to bigger cities for jobs and higher salary demand. Also people will leave bigger cities and move to lesser known scenic and beautiful places and beaches since working is remote. It further says that gradually covid will go away but the disease will remain for many many years and there will be no need to issue visa and follow immigration procedure due to remote working. This effect will certainly fall in India wherever US enterprises are working. God bless us all !!!