[zulrah]

Have you seen Kelsey's Hightower demo where he used s3 event as a trigger for Google Cloud Function? You can already use serverless providers that abstract your function from the provider, but of course in that case you're locked to that specific vendor.

Also, no licence stops you from migrating from Lambda at any moment. Other Companies have you to pay enormous licencing fees and lock you for a one year contract or even longer.