So, for 14 years research quietly continued around the world. (Japan and Italy and elsewhere). No reports from that line of experiments.
Back in '88 Phil Morrison of MIT said of P&F's experiment:
"..If true, it will be the greatest discovery of man since fire". (thus the lawyers' motivation)
Sonoluminescence produces flashes of light in the visible (blue) range, suggesting extremely small regions of great pressure as the symmetrical bubbles collapse. Different from the electrochemistry of P&F.
We will see.
As different as electromagnetic [chemical] interactions are from nuclear processes. I will give this acoustic development a Very Possible as opposed to P&F, which earns a Not Possible Amundo.