You know, I agree - it'd be nice to hear clips with passive pickups --- but when I did the sound clips, I actually didn't have any guitars that had passives.
I play live quite a bit and *NEED* my tone to be what I expect it to be when I pick up any one of my guitars, thus having EMGs in all of my guitars ensure that. I'm sure some purists and tone junkies will all have something to chime in here about, but for my personal needs - it just makes sense for all of my guitars to have EMGs.
Besides - if I were to record clips with passive pickups; chances are that I wouldn't be using the same kind of passive pickups that somebody would want to hear...nor would I be using the kind of cabinet...or speakers...or cables...or mics...or recording techniques...or playing style...power amp...etc...
I guess all of those are reasons that I have avoided doing any newer clips...because I just sort of figured no matter how or what I would use - somebody would complain about what I used to record with.
EMGs provide at least some sort of standard; meaning that they usually sound the same in most guitars and they are pretty common.
I don't think that recorded clips where EMGs were used would provide a sound clip that would be so light years different than if I were to record with passives that anyone would be disappointed with their module choice based on what they expected.
If so - a few tweaks of your amp presence/depth, guitar tone knob or what have you and you could get in the same ballpark.