Given the relatively low amount of public scrutiny/outrage/attention/fear that this death caused, wouldn't you say that the car technique would be effective? (whether or not it was used in this case)
It's effective at taking a life. However I disagree that the fallout was "relatively low", compared to even a badly staged suicide, or "gang violence", "road rage", or a "botched robbery". IIRC a democratic organization employee was recently slain in DC from a "botched robbery" or something and nobody blinked an eye except in the more fringe communities. To me, that's how you snuff someone out, or OD them on insulin and have an official coroner report say "natural causes". I think a fiery single car crash at top speed is a pretty high profile event, almost up there with polonium poisoning.
Just like a guy named Jack Burkman. https://en.wikipedia.org/wiki/Jack_Burkman who offered $105,000 against the $25,000 from the Metropolitan Police Department, for information about his death. With all parties having reasons so see Rich dead, I'd say it may become semi-relevant part in the cinematic workup of the Trump era.