If you're just storing secrets as static key/value, sure.
Vault's real value is in rotating credentials automatically. Some of that value has eroded over time, e.g. Kubernetes now having IAM Roles for Service Accounts. But Vault handles it for databases, and there are a variety of plugins to handle it for other usecases as well, e.g. https://github.com/martinbaillie/vault-plugin-secrets-github
Vault's real value is in rotating credentials automatically. Some of that value has eroded over time, e.g. Kubernetes now having IAM Roles for Service Accounts. But Vault handles it for databases, and there are a variety of plugins to handle it for other usecases as well, e.g. https://github.com/martinbaillie/vault-plugin-secrets-github