> For observability, Coinbase spun up a dedicated team with the goal of moving off of Datadog, and onto a Grafana/Prometheus/Clickhouse stack.

We recently did the same, and our Datadog bill was only five figures. We're finding the new stack to not be a poor man's anything, but more flexible, complete and manageable than yet another SaaS. With just a little extra learning curve observability is a domain where open source trounces proprietary, and not just if you don't have money to set on fire.