[Havvy]

platform agnostic, environment agnostic, cross-platform.

We already have words that mean exactly what is trying to convey. Taking a word that doesn't and adding it to that pool (especially when isomorphic has a meaning in mathematics and computer science already - e.g. two functions are isomorphic if for all inputs they produce the same output, even if their implementation differs) is a bad idea.

Edit: And we who argue that isomorphic is not the right word for this concept already know what the word means. We also know what the words in the definition mean, and also its usage, which is as a relation between two elements in the same set. Saying something is isomorphic on its own is against the definition.