Mmm personally VS Intellisense has never failed for me ever...it can get really slow on very very large projects but keeps working, albeit slowly. I've noticed that Delphi's Code Insight lies to me a lot, finding problems where there aren't any, LOL whut. I second @Der schöne Günther that Visual Studio Code is an amazing editor, I would say probably the best editor out there right now, I use it for Angular and Dart and just love it.