@MattDowle@statquant Some of WIP are awaiting confirmation about design decisions. Others are awaiting another PRs that needs to be merged first. Of course there are as well such that doesn't wait for anything and have just been abandoned before completion.
@statquant PRs are tested automatically in CI when submitted. It's enough if a contributor runs R CMD CHECK and it passes fine, plus codecov revealed after submitting PR. This ensures, in technical terms, decent quality of a PRs. It's algos, efficiency etc, is not subject to automated tests