GitLab is working on a tool just for data teams
Data pipelines are not a great subject for an open-source project. We've been building these for the last 3+ years at Fivetran, and I can tell you that the challenge is:  - Studying each source to figure out the right data model
  - Chasing down a million weird corner cases
  - Working around dumb bugs in the data sources

This is the kind of problem where paying for software really works better. When people build data pipelines in-house, they tend to hack at it until it works for their use case and then stop. When we build data pipelines, we map out every feature of the data source, implement the whole thing at once, and then put it through a beta period with multiple real users. This is easy to do when you have a tight-knit dev team; much harder for a group of part-time open-source contributors.