There are already technologies that work similarly to blockchain (such as Git) without needing blockchain to work. You can have distributed, immutable databases

There are already technologies that work similarly to blockchain (such as Git) without needing blockchain to work. You can have distributed, immutable databases without blockchain. Blockchain's only real advantage is that it eliminates the need for trust. If your system doesn't need to be trustless, there are far more efficient (energy and otherwise) tools that already exist and accomplish everything else that blockchain does.