  After more than a decade of research on photoinduced superconductivity, the
experimental evidence for its existence remains controversial. Recently, we
identified a fundamental flaw in the analysis of several influential results on
K$_3$C$_{60}$ and showed that similar measurements on other compounds suffer
from the same problem. We described how to account for this systematic error,
and reanalyzed evidence that had previously been advanced for both photoinduced
superconductivity and Higgs-mediated terahertz amplification. We found that
both phenomena may be understood instead as a photoenhancement of the carrier
mobility that saturates with fluence, with no need to appeal to a photoinduced
phase transition to a superconducting state. We summarize this reinterpretation
and describe how subsequent work on K$_3$C$_{60}$ provides quantitative support
for it.
