192khz seems to be enough to avoid cheap aliasing, since when aliasing “mirrors” around nyquist, that’s 96Khz, which is far away from the highest audible frequency around 20khz. Never tried this, but I would assume that you can get nearly alias free old synths and renoise samples by using 192khz. Would sound more “analog” or “warm”. Wrong?
@jurek: Nope, define nearly :c And ‘analogue’ and ‘warm’ can/is achieved by other means, you will still have aliasing at higher notes.
But less… Or not? “Analog” sound is maybe the wrong word 
But more warm, since less aliasing which sounds harsh.
Less of course, but to get rid of it completely in the entire note range with even for a saw wave sampleband-limited to44khzyou’ll need these mystical 4Mhz sample rates. So yes, use the higher sample rate, but you have to approach this problem differently, and there are quite a few ways for that., the simplest really would be to do pitching for each key offline with a tool (hint: use it to add some key-specifics)(if you do it externally it will be even faster and there are a few command line programs for that)., it’s only 119 samples (im exaggerating here, of course 
you’ll be fine with 192khz and 4 band limited samples to cover the entire range), if you want a high-quality button for rendering this is where you’ll get it.
This would be really interesting, extremely high sample rates available only for offline rendering… I guess VST is limiting it to 192khz? Just like some global oversampling…
Some plugins will run into problems, some wont, plugins (and renoise effects)aren’t normally designed/tested to be run on rates higher than 192
+1Please add support for 192kHz. it would allow higher quality sampling.