A wswig for internal UI/dashboards has a lot of value for companies that don't have a dedicated internal tools team.
My company had an internal tools teams at one point but it got killed because of other business priorities.
We use https://github.com/sferik/rails_admin, that still requires development time and frontend knowledge, but the framework is terrible.
https://marmelab.com/react-admin/ is much better but also required development time and frontend knowledge.