Silver Efex may be absolutely wonderful, but it’s more important to me to continue with my RAW files. I’m no expert at this in PhotoLab, but creating B&W images seems to be working well for me.
If I wan’t shooting in RAW, I probably wouldn’t be using PhotoLab.
You might say “I don’t know what I am missing”, which is true, but why would I want to duplicate files, using up even more disk space, if I can get what I want from PhotoLab?
It might be interesting if you were to post an original image file here, along with what you’ve accomplished in Silver Efex, so any of us can try to edit the image using PhotoLab tools, and we could all compare them.