Can we get secondary Coherent for VDBs

[coilbook]

Can we have fake/ secondary coherent feature just for VDBs like smoke, etc. (or add more samples to smoke, fire like we add samples to lights ) We have to wait extra 5000 samples per frame at least with smoke to get it to okay noise level especially if we use artificial light like light posts
You can see in the image attached it is clean image except VDb smoke.

In the image attached you can also see noise in zoomed smoke. Would be nice to get average fill of those voids just to have noise free smoke even if it is not 100% accurate