Social Security Death Index is nationwide in the US and seemingly instantaneous, certainly no more than a day or two to update. Although half your argument is

Social Security Death Index is nationwide in the US and seemingly instantaneous, certainly no more than a day or two to update. Although half your argument is invalid, the other half remains perfectly valid, along with the overall conclusions, etc. SSDI is pretty useful for recent (dead in the last century or so) genealogical research.