[SophosQ]

Perhaps it's more to do with the stock of people who learnt CS.

In the older generation, CS was a relatively obscure and difficult skill with little to no easy-guides that it filtered the set of students to only those who were insatiably curious and were fuelled by learning new things.

In contrast, CS has become so ubiquitous that nearly everything has a "how do it" guide that eases the entry of nearly anyone, with little or not interest or whose motivation might be less than ideal. Thereby, possibly leaving room for more anecdotal evidence for this perceives shift in skill.