Unless I'm missing something, it's quite strange that a plugin old enough to drink anywhere in the world doesn't include a simple noise gate among its list of 92 effect modules. π
Aside from being important for all the standard reasons, it's crucial for CPU savings in DAWs like Reaper that automatically bypass plugins with no output (below silence threshold) to save CPU.
If effects are going to output noise with no input (Replika, Reverb, etc.) there really needs to be a gate to silence it. Since added noise is cumulative for each effect and instrument in a multi, it's easy for the SNR to end up in the 12-15-bit range.
Guitar Rig has an input gate, a noise gate effect, a noise reduction effect, and also includes Solid Dynamics which has a gate. Kontakt has none of these despite costing more and being the "industry standard" for users and developers alike.
Please consider one of these the next time you're porting an effect into Kontakt. π