This feature, Batch Mode on Rowstore, allows all operators enabled for batch mode to operate as such in SQL Server. What does this mean? It means that query operations can process data faster, more efficiently and mimic what makes columnstore so fast. Instead of reading row by row (row store mode) it can read in chunks i.e. batches of 900 rows at a time. The performance impact of this can be tremendous which effectively uses CPU more efficiently. https://sqlespresso.com/2020/06/16/what-is-batch-mode-on-rowstore-in-sql-server/