Hello,
I'm the author
so at this moment the project is slowly growing (about 10+ companies I know are starting to adopt it )
Main benefits are - OpenAPI spec oriented - lightweigh and 0 intrusion to django-core (basically django-ninja is just a validation/documentation layer for django views) - high performance (some cases can be 2x-100x faster with than DRF)
My hunch is that it's probably better to stay with the Django way of doing things (DRF), in spite of the online chatter calling it bloated.