Back in 2015 I and others thought of this. Who knows, it was probably thought of prior to this too.
Here's what I said in 2016. Still feel the same way, so this saves some typing:
Well Skoczy, I think the real value of what Gianfranco has done is to provide a reference DI signal that we can use in troubleshooting.
If, say, somebody claims his / her unit "sounds funny" in some way or another, both he / she and we can pop this file through our Kempers to see if the issue manifests on both ends. If the Rig in question isn't on the exchange or a factory one (home-made, for example), it can be shared via attachment or placed in the exchange so we can all use the same signal as well as Rig. This ought to help very much in exposing (or otherwise) noise / glitch / hiss / scratchiness / volume / tone or response issues.
This was the general idea back when we discussed it last year, IIRC; I was keen for this to happen both for this reason as well as for general tweaking / auditioning without having to play.
Here's the thread:
A dry guitar track for our tests
The dropbox upload still works, so that's one DI track at least:
Dry Guitar.wav
I also forwarded the idea that we have a collection of test passages built into RM. This would make auditioning so much easier - just pick a style and tone that's similar to one's own sound and immediate need, and it loops automatically whilst one up-and-down arrows through Rigs.