And indeed, when MongoDB first came out it had all sorts of issues living in production environments. Now, on the other hand, its well-understood, the serious bugs are fixed, and its ready for casual users. How long would it have taken you to get everyone (including dev-ops) up to speed on MongoDB as opposed to actually building product over MySQL until (as it is today) a competitive solution was stable and "boring" enough?
If handling data elegantly is your company's selling point, then maybe its worth innovating on your storage engines and being on the "bleeding edge". If that's the case though, the article is suggesting that you don't simultaneously innovate in your development language, source-code storage system, and business model. That's all.