1. Based on Clickbench results, pg_analytics is still far from top-tier performance. If you're looking for a high-performance OLAP database, you should consider the top-ranked products.
2. The queries tested by Clickbench are really simple, far from real data analysis scenarios. You must be aware of the TPC-DS and TPC-H benchmarks, because ClickHouse simply cannot run these test suites, so their Clickbench does not include these datasets.
Lastly, I want to say, if your enterprise is of a certain size, separating OLTP and OLAP into two databases is the right choice, because you will have two different teams responsible for two different tasks. By the way, I use StarRocks for OLAP work.