Capturing stdout from individual test methods

Similar to, I’m looking for a way to capture the output of stdout for each test method, so I can dump it to a directory/file structure of my own creation. From my digging, it doesn’t look like it’s possible today to write a plugin to do this. Is that right?

So, I suppose I’m asking if anyone is working on the stuff in testing-improvements, and if by some miracle there’s a target date for completion. Perhaps related, I don’t see the items in testing-improvements mentioned in the roadmap. Does it make sense to add something there?

Thanks much for your help.