companies often find themselves using more than 1 tool that generates alerts, for instance when Datadog is not sufficient (lacking some integration, need some other dashboard capability, etc.).
Grafana Observability survey mentioned that 52% of companies who answered the survey use more than 6(!) different observability tools.[1]
let's leave the fact that Datadog itself expensive as hell and the fact that organizations do move towards consolidations with observability-it's never enough alone.