This was my question as well. Metabase is continuously getting better - why would one divest themselves from metabase for this? What are the primary advantages?
- Cron based scheduled emails embedded with reports
- Auto-generated documentation for all the REST APIs using swagger
- More than just SQL - SQueaLy uses JinjaSQL behind the scenes which gives you power to use JINJA inside the SQL query.
You can refer the readme for more details