Maybe this can inform you!
From authors
"Yes, Rocket has absolutely the same features as NVil!
NVil is platform for Rocket, so every new updates that NVil will get, will be availible for Rocket too!
So you can migrate without any problems!
You can think about Rocket 3F Pro as NVil on steroids! "

Alas for me the "funcky" UI has disapeared!
For old persons colors are very useful for spotting something in the dark!