After using the latest build (NS v22.0.0.82) for the last few hours, I am impressed by how light it 'feels' on my test system. It seems quite stable too! Put aside that the beta doesn't receive updates as often as the released versions and there are a few cosmetic bugs still to sort, I'd almost say this is getting close to what is expected from Norton / Symantec in their Production releases (on my machine).
Great work guys & gals!
Edited to add it works fine on my machine. Your mileage may be different.