I think there are just more people in the world now than there were 40+ years ago, and they travel more.
Probably in 40 years time people who are young now will be saying much the same sort of thing about their 'revisited' holiday spots 
Mind you, where we live now in Co Durham is very attractive and a wee bit of a tourist spot. I wouldn't have cared to live here 50 years ago when it was wall to wall coal mines, coking ovens and railway lines...
What medical conditions seem more common now than when you were growing up?
Am I just being impatient and mean? New PM

