Possibly not flying more makes you boring or stuffy. However getting older does cause people to become more boring and conservative, possibly with a big C.

So BA have looked at the age groups of customers and felt that they wanted to embrace younger people who felt that BAEC was a little boring.

I know that some people have or had a gold card in their twenties. I have had both of them myself. However its fair to say, especially in todays market, that the more corporate pax will be older and more senior in terms of job.