[tetron]

There seem to be some misunderstanding here.

CWL is intended for stringing together other programs. It is useful for reproducibility in that it attempts to provide a fairly specific description of the runtime environment needed to execute a program, and also abstracts site-specific details such as file system layout or batch system in use. CWL platforms such as Arvados also generate comprehensive provenance traces which are vital for going back and reviewing how a data result was produced.

Leibniz seems to be a numerical computing language for describing equations, which is more similar to something like NumPy or R. It seems like an apples-and-oranges comparison.

The original call-out is weird, because CWL did not exist 10 years ago so you can't yet answer the question yet of whether it facilitates running 10 year old workflows.