Oh? If that were true, why is Gmail STILL so popular?
Possibly because tha yoof of today don't really use email any more, just maintaining an address for those services that require you to have one? A simple free service is all they think they need. They "communicate" (for wont of a better word) by snap-twit-whats-agramming, hopping from trend to trend like the eponymous frog trying to cross the river and road in that game we all played in the 1980s.
When they get to work, work provides an address.