It's the submission paper to the 13th European Lisp Symposium (ELS20) last year in Zurich. Lisp conferences put a higher demand on their submissions to be like formal papers. With external reviewers and such. This is one.

At this stage nativecomp was not yet finished, see his webpage for the progress. Expect another paper for the final evaluation of the improvements. It has big impact on programming languages implementations, esp. compared to llvm.

It's the very first big gccjit project, and a huge success.

Experience reports are also common as scientific papers. [1]

[1] https://sigdoc.acm.org/conference/2017/guidelines-experience...

Your question comes across as uncharitable and I suspect you have no relevant experience. Without implying that your question has any validity, if you have an academic career, you need publications. Therefore it's the opposite of what you imply. We want people to feel welcome to write up all sorts of computing achievements in academic forums, because that is what will help the authors be able to carry on doing what they are doing and thus allow us to benefit from their work.