[AtNightWeCode]

I really enjoyed reading this. Very well written. At companies I worked teams can never read data from the DW btw.

My experience with A/B tests is that they are way overrated.

On the poor data quality. You sit on a product like a call center. Frontend developers thinks it is an excellent idea to store all data in some doc db blob. Then business wants stats about number of calls based on users...

Be careful when putting tabular data into doc dbs.