The new and important thing was the discovery that C++ can be modular, too. Modular in a way that each class doesn't have to be in its own file, but classes can form larger thematic files (modules). In large projects I feel it makes management of the source code easier.
I've tried to shift my thinking from technical details to content, but it's difficult. I like improving the source code and I've became sensitive to poor technical solutions of the past, but at the same time I know I can work with that rather than trying to "fix" everything.
