Debugging

Because serverless systems run in environments not under the adopters' control, debugging issues in production can be difficult. In traditional systems, one could attach a remote debugger to the production runtime when troubleshooting issues. Such a mechanism is not possible in the serverless world. Previously, the only way to work around this was to instrument the code execution. But providers have taken cognizance of this fact and are shipping tooling to support this. It is not complete and overarching, but the tooling will get there in due time.

It is important to note that even these drawbacks are not really deal breakers; there are workarounds for them, and, as the serverless paradigm evolves and the tooling gets standardized, we will see their impact being mitigated in the near future.