The period from 1945 to about 1975 was an anomaly.
[snip]
Immigration is more prevalent and global workforce mobility is the new norm. So the “natives” tend to long for a romanticized past.[/quote]
This is really the crux of my point. It is likely that this “romanticized past” (or in my terms, “Halcyon Days”) was the anomaly… not our current situation.