The next generation of serverless

A .zip is much more monolithic, and there are no ready-made .zip registries you can upload your .zip to that will automatically checksum it, or allow it to be delivered in layers (and skipping the layers already present on the registry/destination).

Heck, even if you're curious about WASM and want to try some experiments with (say) fast Rust crypto libraries or embedded database engines w/o the risk of flaky native code crashing your V8 runtime: again, you can just run WASM from a Node worker thread and keep cruisin'.

For those of us who _don't_ have a huge investment in Node, have hard requirements around e.g. memory usage, cold start times, or even just plain old _cost_ (which can become a major factor when you consider the AWS lock-in) that Lambda doesn't meet really benefit from another option.

Your good fortune in finding a stack that works well doesn't mean that folks who have different needs or constraints are dumb, ignorant, or lazy.

As an aside, I think you also might be underestimating the depth of experience and knowledge of the Fermyon crew when it comes to containers, cloud runtimes, and serverless development. This is substantially the same team that built Helm, and a lot of other Kubernetes and cloud-native ecosystem projects along the way.

First, the good stuff:

- As a Rust developer, the SDK tooling is really good. I went from running the installer to generating a templated app to dropping in my own app logic in about 15 minutes.

- Local development iteration is also very fast and low-friction. Building everything as small WASM components means you effectively get hot module reloading for free, without needing to shim in a bunch of extra dev-mode-only code loading logic (with all the inherent incompatibilities and heisenbugs)

- The component reuse model feels a lot easier for me to reason than interminable chains of Express middleware (YMMV, of course)

- You get actual static (WASM) binaries, which can be as small as your compiler makes them. I'm normally pretty thrilled to get a production app container down to There are some less-great things:

- The "outbound" DB adapters are _very_ bare-bones. You only have access to a small list of datatypes, and you can't really layer higher-level libraries on top b/c the APIs aren't compatible with standard backend drivers. (Furthermore, if you want to use e.g. MongoDB, Clickhouse, Dynamo, etc., etc.: sorry, I hope you have some sort of HTTP adapter lying around ready to use.)

- WIT (WebAssembly Interface Types) is a cool _emerging_ standard, but like a lot of WAS* community stuff it's still in a fractured "draft" state, and many of the actual interfaces exposed in Spin are unique to their runtime. (This also means that _extending_ something like the PG bindings requires a ton of indirection code spelunking; I gave up trying to add a few new native types after realizing I would also have to support them for MySQL and every other backend DB.)

- The development environment, while relatively complete and usable on its own, doesn't really play nice with Nix or other high-level dev environment tooling. (There are literally invocations of `rustup` inside the top-level `build.rs` for the project, so good luck providing your own paths for e.g. `rustc`.)

On balance, I'm enjoying the experience thus far and starting to think about more thing-ish was to apply the tools. I'm also looking forward to trying out more of the self-hosted infrastructure stack. I'm not opposed to paying for managed hosting, but I do occasionally build things that need to run in "offline" or air-gapped environments, so being able to bring up a full hosting environment is pretty clutch.