Just because the current build is playable doesn't mean the developers are done. The roadmap for heading toward 1.0 includes:
This led to signature features added during Early Access:
MinMax Games publishes a detailed development log every single week . The roadmap is public. The Trello board is public. If a feature is delayed, they tell you why. If a patch causes a bug, they hotfix it within 24 hours. This level of communication has built a fortress of trust around the community.