I think there's a scale/complexity thing to be considered. If your web app is simple, then frameworks and "safe" languages are unnecessary. At some stage thou

I think there's a scale/complexity thing to be considered. If your web app is simple, then frameworks and "safe" languages are unnecessary. At some stage though, that flips around. There's no way I'd choose to write, say, gmail or Trello in "plain javascript". The learning curve of a suitable framework for projects like that are well worth the eventual productivity, and the number of feet to shoot in your project will way exceed the number of feet added by the framework, and hopefully the framework will prevent way more foot shooting opportunities than it adds.