Teasing aside, this works surprisingly well. The default settings for dehydrate is 150°F, which is well under the glass transition temperature for PETG.
Would not recommend for ABS/ASA. I have no idea what temperature that plastic starts putting out its toxic fumes at, and I don’t want to find out.
I have heard about the pet peeve about “single purpose” devices, especially with kitchen appliances. But once you start putting non-food things in your for-food devices, maybe rethink your multi-purpose approach.
You wouldn’t use your table saw to slice bread either.