I was wondering, once IBM got Hashicorp, if they would reverse the license change for Terraform. Not been that long since the announcement, so still hoping they will.
Red Hat used to routinely open-source acquisitions. Sun also did— that's how we got OpenOffice (and by way of it, LibreOffice). StarOffice was proprietary when Sun bought it.
Way back when the license changed the threads on HN had HashiCorp employees claiming the change was primarily to protect HashiCorp from the fact IBM was reselling Vault. IBM then went ahead and helped fork Vault (OpenBao).