30-40 people; not much TPS but we're not primarily building a web app; we have event-driven data pipelines and microservices for ML data.
If you're primarily building a web app, a monolith is fine for quite a while, I think. But a lot of the stuff in the post is still relevant even for monoliths - RDS, Redis, ECR, terraform, pagerduty, monitoring/observability.
