This is a discussion post. Please read on for the specifics.
Old Question: Is there such a thing as a Ubuntu Certified Engineer?
New Question: Are there any Ubuntu Courses or training programs?
Currently, the Old Question is old as sin, with all the answers out of date, and no updates for at least a couple years. The correct answer is "There is no Ubuntu specific certification or training programs" nowadays, given that the Ubuntu technical certifications were discontinued, even as part of Advantage.
Given this, the New Question was asked, and I posted my answer, pointing to other Linux-generic certifications that would work, given there is no Ubuntu certification anymore. As such, I'm considering the Old Question abandoned.
So, this ultimately spawns this question/discussion: Which question should we consider as valid, AND, at what point can we consider an answer-accepted question outdated, invalid, and abandoned?