I also noticed, from same contributors, this repo with goal of enabling import/export of vector datasets, that can be migrated from one vectorDB vendor to another. The in-common format vectordb data can be stored/shared on HuggingFace datasets, using the in-built flag for it. Then anyone using another vectordb could download it.
A table comparing the features available with different vector databases. The project is open-source and developed by a community of practitioners with points of contact from the different vector databases to validate.