Thirty years ago no one was buying smartphones from a major brand. No one was buying any smartphones at all.
We are mostly saved by the part of the 70+ crowd who is completely computer illiterate and own significant investment resources. But that will only last 10-20 more years.
But it's a comparatively huge pain in the ass to use a lot of government services where I live without a smartphone.
And my forefathers probably fought in wars against your forefathers. The world would have probably been better off, if they all had just stayed home. Nothing glorious about that.