No, not at all. We run standard python, so we can build with any kafka library. Our decorator is just a subclass of the default decorator to add some kafka stuff, but you can use the generic decorator around whatever kafka library you want. We can build and run any arbitrary Python.

But yes, if you find there is something you can't do, you would have to build a container for it or deploy it to an instance of however you want. Although I'd say that mostly likely we'd work with you to make whatever it is you want to do possible.

I'd also consider that an advantage. You aren't locked into the platform, you can expand it to do whatever you want. The whole point of serverless is to make most things easy, not all things. If you can get your POC working without doing anything, isn't that a great advantage to your business?

Let's be real, if you start with containers, it will be a lot harder to get started and then still hard to add whatever functionality you want. Containers doesn't really make anything easier, it just makes things more consistent.