When the MAF was going out on the Buick it would run normally, then out of the blue spit sputter and even die as she was trying to pull into traffic or take a left across 3 lanes or something. In other words it could be dangerous.
Throw a MIL code or whatever but there should be some default where the car is still operable if not at its best efficiency. It still knows how fast it's going, what gear it's in, where the throttle is, etc. That along with everything else "should" be enough.
Its not like it's going to cause engine damage or something to keep it running. Only things that should cause a shutdown is stuff like loss of oil pressure, severe overheating, etc. Things that can actually do real damage. Should be defaults for everything else, at least as far as a single sensor going haywire anyways.
Of course imo and ok boomer, etc. etc.