The word "possible" is doing a lot of work in that quote. Notably, if enough people go back to the office because they prefer to do so--especially if they're managers or others who can influence things like good reviews and higher raises--there will certainly be a tipping point where more people see themselves as "needing" to return to the office in order to further their careers and money.

And if even more people return, the habits like remembering to make meetings accessible to people who aren't physically present will fade. Not that meetings were particularly accessible, even in many tech industry companies, before. Conference room audio equipment is quite bad in a lot of places.

Possible seems to me to mean if almost all people in a company, group, or department are working remotely, if working remotely isn't seen as a career impediment (or working in the office isn't viewed as more of a boost than working remotely would take away from), and if people can still participate in groups, then perhaps.

What I figure we will see is a hybrid, where people are in the office a day or two per week and at home the rest of the time. That still means you have to be within commuting distance of an office and still have to make child care and other appointment arrangements.