Physics Today editor Charles Day makes valid points in his recent editorial, 'It's All Too Much' (Vol. 74, No. 12, December, p. 8) when he cites the research of Johan Chu of Northwestern University and James Evans of the University of Chicago in October. Their published analysis of bibliometric data drawn from 10 broad fields in science, medicine, engineering, and mathematics, e.g.
J. S. G. Chu, J. A. Evans, Proc. Natl. Acad. Sci. USA 118, e2021636118 (2021). https://doi.org/10.1073/pnas.2021636118
Featured a main conclusion that is sobering: As the number of papers in a field increases, researchers find it harder to recognize innovative work. Progress seems to be slowing.