To answer that question, I do. I reuse descriptors often for performance but also use prototypal inheritance as well.Since most descriptors share the same common properties for all but one (or two) fields, they are an ideal candidate for use with prototypal inheritance.
The answer though in that case is easy enough though, make sure the prototype descriptor is created with Object.create(null). This wouldn't solve compatibility issues with in-the-wild code but it solves the issue for most people who care enough to use anything dealing with descriptors. Who knows whether anybody does things like this >
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