A TedTalk on npr; about to switch when an Aha! struck there:

40 Scientists--chosen for being 'best & most productive in Fields=='Top'--queried re How? do they
continue coming up with significant New-papers.

Query: (after their psyching-out a bit of How to unravel such a leading-Q.)
How often do you switch 'Topics'? specifically: during the course of your first (?) 100 Papers.
3X?
.
..5X?
etc.

Reply/average!
.
.
.
.
.
.
.
.
.
.
Thirty-seven times.

Go figure.