It's not a misconception. If you need to store timeseries and actually do something substantive with them (time oriented joins; calculating bid-ask spreads, ord

It's not a misconception. If you need to store timeseries and actually do something substantive with them (time oriented joins; calculating bid-ask spreads, order book math, correlation matrices, calculating betas), Postgres won't cut it, even on a relatively small data set, like all the OCHL daily stock market data for the last 30 years. Neither will any of the other open source solutions.