The only Limitation i believe is DB runtime , we can always choose the cluster mode as high concurrency for any Run time .
Currently it is supported for
- Databricks Runtime 8.1 ML, Databricks Runtime 8.1
- Databricks Runtime 7.3 LTS ML, Databricks Runtime 7.3 LTS
- Databricks Runtime 6.4 ML, Databricks Runtime 6.4
- Databricks Runtime 5.5 LTS ML, Databricks Runtime 5.5 LTS