> Then it's just a massive waste of time and gets in the way.

I find it very useful for several purposes that have nothing to do with mocking or testing.

> and have become blind to just how much extra code it generates

It doesn’t generate any extra code at all.

For the record, I think that built-in .NET DI is pretty bad. It would be better if they managed to avoid including that abstraction in the framework, even if I personally choose to use DI in most of my projects.