I think I did some testing once that showed WvIn as faster (more voices without clix)
Ah, yes, that makes perfect sense as it's more modest feature-wise. I could see how that would be useful in a situation like Mike's where you have many different samples and perhaps no need for interpolation.
Another solution to this kind of thing that I considered for my own situation is using trickery to figure out when we are not making any sound and pre-loading sounds that will be needed in the future during that time and not when we are more busy. Stuttering silence is, after all, still silence. Probably a good idea for step sequencers using short samples and where it's easy to figure out where the rests from the pattern memory are and less great for generative drones.
I think Ableton using pre-loading of the first bit of all clips that may be triggered and uses the time that buys to ready HD streaming. That seems like a sound strategy but personally I don't think I've ever needed more memory than I have ram in the past 5 or so years.
Yours,
Kas.