> What does it do better than Linux?

The job control and batch queues built into the OS allow for some really powerful workflows and I can't think of a way to replicate that in Linux without a lot of extra software that needs to be maintained.

Source code management and file versioning built into the OS and all the triggers and customization you can do would enable some really interesting CI/CD without a need for any extra software.

But I still wouldn't procure a brand-new OpenVMS server and start a business with it.