It's possible to do serverless without lock-in, in the same way it's possible to do containers without lock-in. At the moment serverless vendors make that hard

It's possible to do serverless without lock-in, in the same way it's possible to do containers without lock-in. At the moment serverless vendors make that hard, and the frameworks (like serverless.com) are still emerging to make that simple. For me the problem is most people don't think through the cost/benefits. Amazon don't ever get tired of saying "never pay for idle" in their sales pitches, but quite a lot of applications out there are never idle and can be quite accurately managed in terms of scaling, and therefore you're actually paying a premium for something you don't need.