Yep. The last company I was at was a Java shop. We had no need for containers. We built a fat jar for each "service." A deploy was little more than copying that

Yep. The last company I was at was a Java shop. We had no need for containers. We built a fat jar for each "service." A deploy was little more than copying that fat jar + configuration file over. Multiple services easily ran without Docker. This approach was way lighter weight than pushing enormous images around.