In Week 1 course, Prof. Plattner has mentioned that he was against separation of Analytics data from OLTP systems. Due, divergence of OLAP and OLTP we require more hardware, carry out complex aggregations and ETL techniques.
Having IMDB would solve the issue.
But wouldn't the cost be great. As, we need costly in-memory and also huge databases to archive and log data for back up.
So, shouldn't SAP just concentrate in making ETL technique more efficient and faster or it there any technical hindrance to it.