This. Configuration flags increase complexity. Every time you change the feature in question (or add something that uses it) you will have to take into account every possible flag combination.
That's not true. It's like whenever you change a line of code you need to take into account every other line of code in the project.
If option for backspace behaviour suddenly starts interfering with some unrelated feature, it means somebody seriously fucked up the architecture of the project. Nothing else. Configuration flags aren't scary, and should not be used as a rationalization for dumbing down software.
