I think that in the end it might be worth to completely switch to nuttx.apache.org then. If Apache wants this to be the frontface of project websites, it only adds confusion to have nuttx.org there.
I have also been mirroring the incubator-nuttx repositories in the old Bitbucket area. Probably should end that as well.
I am inclined to keep the NuttX Google group. It does cause some confusion and is not being use extensively now, but having as many public discussion forums as possible is a good thing for the project. Just as we should keep Alan's LinkedIN NuttX group. I think specialized discussion groups and greater social media presence is a good thing.