Companies are too efficient for that, even if dev salaries were cheaper they would still want to fund just one version and pocket the difference, and eventually market competition will make that the norm.
Not only that, but corporations are not everything. What about one and two person shops? It would really be nice to be able to develop a product without first having to invent the universe.
Counterexample: banks started with shitty cross-platform UI type apps, but those received low customer satisfaction figures so most of them have now switched over to native apps. A similar thing happened with Facebook.
