Liberation will always be free software, which means your rights as a user are respected. There is no vendor lock-in.
Liberation is licensed under GNU GPLv3, which means any development built on top of it must be contributed back to the project.
Even if the core Liberation team stops development, you'll still have access to the complete codebase. You can hire developers to add features and fixes whenever you need them.
These guarantees make Liberation a worthy investment for the long term.