Cessna nearly went bankrupt due to liability lawsuits. The consequence was not safer planes, but fewer planes.

I think the right way to go here is (proactive) regulation and certification, not (reactive) law suits.

I think the scale of economies between Cessna and Boeing are going to be hard to compare.

Scale is irrelevant to the dynamic of "a good stops being provided when the assigned liability is out of proportion to what the provider can reasonably control". Cessna was hit with vindictive, overreaching lawsuits that somehow succeeded, which had the effect not of safer airplanes, but more expensive ones without meaningful changes to safety.

"Boeing's bigger so I don't have to care about that dynamic" is not the right way to react to that concern.

I’m not sure what Cessna’s case was but Boeing and the FAA’s negligence is absolutely horrible here. I’d give them a begrudging pass with some fines slapped on if they’d grounded the fleet and disclosed their deception after the Lion Air crash. But after that and knowing what they knew, people need to go to prison for this.