Terraform, the leading IaC (Infrastructure as Code orchestrator), was created 9 years ago by HashiCorp and is considered today as the de facto tool for managing cloud infrastructure with code. What started as an open-source tool quickly became one of the largest software communities in the world, and for every problem you may encounter, someone has already found and published a solution.
At the end of the day, DevOps managers are looking for a simple, predictable, drama-free way to manage their infrastructure, and this is probably why many have chosen Terraform, which is a well-known, well-established tool with a very large community.