No longer needing space for offices and retail was easily predictable. Speeding up the process with a pandemic, not so easy to predict.
Even the need for housing space is shrinking. Young people seem to have little interest in “collectable stuff”. Just so they have a smart phone and internet.
Even without the scamdemic, the way technology was headed it was only a matter of time when It would become wasteful, zillions of wasted hours commuting, business clothes, baby sitters, tens of thousands wasted in fuel...All of this wasted time and money when 50 percent of the people could easily do it from home.
Dunno where you got your “data” but it is false. Millennials are moving to the suburbs at the same rate as the previous generation. The suburbs have been the fastest growing regions since the recovery from the 2009 recession.