If you’re building a serverless application to run at scale, then read this post from Paul Johnston on Medium…

Within the community we’ve been debating the best practices for many years, but there are a few that have been relatively accepted for most of that time.

Most serverless practitioners who subscribe to these accepted practices work at scale. The promise of serverless plays out mostly at both high scale and bursty workloads rather than at a relatively low level, so a lot of these best practices come from the scale angle e.g. Nordstrom in retail and iRobot in IoT. If you’re not aiming to scale that far, then you can probably get away without following these best practices anyway.