I can install a relatively minimal Linux server (usually Ubuntu Server), disable snaps, install Docker community, copy my app directories (with docker-compose.yaml files in each) and `docker compose up -d` in each directory and be (back) up in moments. When I was trying a couple different hosts for mail delivery, the DNS changes took longer than server setup and copy/migration. It was pretty great.
It's also lead me to a point where I'm pretty happy or unhappy with given applications by how hard or easy a compose file for the app and it's dependencies are. Even if, like my mail server, the whole host is effectively for a single stack.
No, I'm not running more complex setups like Kubernetes or even Swarm... I'm just running apps mostly at home and on my hosted server. It's been pretty great for personal use.
For work, yeah, apps will be deployed via k8s. The main projects I'm on are slated for migration from deployed windows apps, mostly under IIS or Windows Services, to Linux/Docker.