I disagree and it is not many years behind schedule. It is pretty much on schedule. Now SpaceX might make it obsolete, but that has not yet happened.
“I disagree and it is not many years behind schedule. It is pretty much on schedule.”
“The intended uncrewed first flight of SLS has slipped multiple times: originally from late 2016 to October 2017, then to November 2018, then to 2019, then to June 2020, then to April 2021, to November 2021, and then to some time between November 2021 and March 2022.”
Back in 2015 I worked on the Test Plan for the Exploration Flight Test-1 or EFT-1, the first scheduled SLS flight.