It's always a tug of war between "power-user features" and "simplified-interfaces for common users". It seems like Chartio is using visual interfaces to bridge this very gap and it seems like a very polished outcome.

I think the elephant in the room though is that this is a technical solution to a non-technical problem. You can't teach all users to be highly proficient in your app through a perfect interface - because the perfect interface does not exist. You teach them through traditional training methods and continuous training investments and infrastructure.

Going through their landing pages it seems like Chartio is offering support and training packages, so there's definitely nothing wrong with them supplementing that with better visualization tools.

In general however I just wish more companies would invest in the training layer earlier and not try to bail themselves out with the perfect redesign - cough reddit cough.