[nstart]

Having worked in ERP, Ecommerce, Financial tech, and general SASS based tech stuff, I agree with you on the "not too many use cases where having schemaless is a good thing". In most cases it's a shortcut and an unnecessary tradeoff made by people to avoid the few technical issues like DB migrations (also, a solved problem in many ways as long as you don't attempt to reinvent the wheel). The only time I saw a good use for a NoSQL db was to store products in Ecommerce. Managing taxonomy and attributes was always a nightmare and everyone was constantly afraid of performance issues (being on Magento and battling the EAV system didn't help). It would have been great to have only the products being stored on a NoSQL instance and the rest of the data being on the traditional relational data store.