[jschwartzi]

I don't think the issue is with the system's ability to replicate the effect. Rather, with a digital system you're now faced with the problem of explicitly representing the effect, where the analog system had the effect built-in. If you can't quantify the effect then you will be unable to replicate it, and if you can then you have to do the work to replicate it. If these effects are a signature of your work, I can see how it would feel like a step backward to suddenly have to quantify them, and it would be very tempting to switch back to the equipment that already applies the effect.