I have seen that the NestedRows plugin is listed as an experimental feature.
Is there any timeframe of when/if it will be included as a production-ready feature?—I have checked the latest Roadmap, but there is not any mention about it.
We did not schedule the task as we wanted to keep the Roadmap simple and list only the tasks that we really need to fix/add or change.
The nestedRows can be called an alpha as it does not work as expected with a few other plugins. It is hard to say when it will be done as it’s a time-consuming process and we would need at least a month to push the project where it should be to be called a stable version.
I highly encourage to give it a try and check if it meets your project requirements. I guess that the first thing that we’ll do is make it work with sorting (sorting inside parents) but we did not make and steps to develop it (just some simple analysis).