Before I had a chance to work with datadog, I generally operated Prometheus / Grafana as it's basically industry standard in k8s. The ability for an application

Before I had a chance to work with datadog, I generally operated Prometheus / Grafana as it's basically industry standard in k8s. The ability for an application to publish it's own often very detailed metrics and have those auto scrape is powerful. Learning that datadog charges these as custom metrics was shocking. This opens a wormhole of allow-list or opt-in considerations, and then there is tag cardinality or even introducing a middleware like vector. It feels very backwards to spend effort on reducing observability. If datadog was crap it would make things easier, but it really is a fantastic product, and a business after all. Prometheus integration is just so very cumbersome which is probably strategic I would imagine.