While there is no doubt that 'CD Index' has been declining over time, it is debatable whether it truly indicates a drop in 'disruption'.
Let's take AI for example. Research papers that were published in 2019-20 have become obsolete within a year or less, and consequently get cited less and less, as more recent and derivative papers introduced better models. Does that make the older papers any less 'disruptive'? No!
Let's take AI for example. Research papers that were published in 2019-20 have become obsolete within a year or less, and consequently get cited less and less, as more recent and derivative papers introduced better models. Does that make the older papers any less 'disruptive'? No!