Are you doing what Gitlab claims below "We (GitLab) use it mostly as a templating system as well" or really using it to manage complex apps? I think it doesn't

Are you doing what Gitlab claims below "We (GitLab) use it mostly as a templating system as well" or really using it to manage complex apps? I think it doesn't really offer much for normal microservices. I do use it for things like nginx ingress but for stuff I've built a service.yml / deployment.yml are fine.