Kdb+ is incredible. It blows away any of the current attempts at time series data stores out there (eg; InfluxDB, OpenTSDB). Unfortunately, Kx Systems failed to

Kdb+ is incredible. It blows away any of the current attempts at time series data stores out there (eg; InfluxDB, OpenTSDB). Unfortunately, Kx Systems failed to allow it to reach mass popularity by keeping licenses extremely expensive. Startups simply can't afford to outlay $100k+/year for a tiny cluster.