I’ve just written that I believe the FAA was reasonable not to ground the Boeing 737 MAX, and that doing so brings along its own safety risks. I wrote that I hoped that new data would be what guides any shift in position.
Minutes after writing that, though, President Trump announced a grounding of the aircraft type. It’s not obvious that there’s been any actual new information which has become available since the FAA resisting doing so. The only meaningful news item has been Canada’s decision to ground the plane, also based on no new material information.