Perhaps these companies have such varied requirements that none of the existing TSDB systems fully support? We built our own custom time series db, along with

Perhaps these companies have such varied requirements that none of the existing TSDB systems fully support? We built our own custom time series db, along with a suite of tools for accessing, slicing, plotting, etc bc (at the time, at least) there was no support for bitpacking data, and storing/calculating certain spatial data operations.