I'd bet you that 95% of all programmers can't even explain from memory what exactly Terraform is.

Case in point, I have no idea. I know it's something related to the cloud but none of my clients are using it.

And their Wikipedia article is filled with buzzwords and no explanation of what it does, which doesn't exactly give me confidence that it'll be useful for regular companies. "Infrastructure as code"... so Ansible or docker compose? In any case, you don't need it if 2 HA bare metal servers do the job.