I noticed today that block group level data for the 2010, 2011, and 2012 ACS 5-year estimates are no longer available for download in data.census.gov, but tract level data for those years are still available there. Does anyone have any insight on why block group level data for those years are no longer available through this portal?
To my recollection, block-group level data has never been available for those years via data.census.gov. We provide that data through IPUMS NHGIS. (We don't yet have the brand new 2022 5-year data at NHGIS, but we're working to add it very soon.)