John
Why would there be a problem with the way its always been? Where is the oversampling meaningful, in what pert of the spectrum? I am a bit doubtful as to its necessity.
It's desirable or necessary for plugins that do processing that creates frequencies greater than 1/2 the sample rate but do not upsample internally for whatever reason (even though they should).
For instance any plugin that creates distortion, saturation, etc. as well as some synths that create funky waveforms with loads of high frequency content. As I believe was discussed in the other thread, this might also include things like aggressive limiting.
Basically for plugins that don't do it themselves, the high frequencies get filtered out instead of folding over (aliasing/imaging) into the audible range.