OK this problem exists in NA 2, Kontakt 7, Komplete Kontrol and Maschine.
In the case of NA2, the busy GIF is active for over 10 minutes before the programme is becoming usable.
Process Monitor reveals that what is happening is that the NTK Daemon is scanning over and over my VST 3 folder and in the case of some plugins, Blue Cat, UA, Flux, though there are others, repeatedly and acknowledging their attributes.
Why???
In most cases, NA2 has no use for these files?
(Windows 10)