The largest application where we use this pattern has 131737 lines of code (according to cloc), and four 'main' classes which do dependency injection, which cre

The largest application where we use this pattern has 131737 lines of code (according to cloc), and four 'main' classes which do dependency injection, which create roughly 155, 145, 111, and 95 components. Those files total 8949 lines of code. They're doing more than just injection, though, there's quite a bit of code for other kinds of setup and configuration. Remember that this setup code is just code, so if you find that adding a constructor parameter means modifying a thousand call sites, you should probably refactor it a bit first, so that it doesn't. That being said, this approach to DI does take some tedious manual work to maintain. But by paying that cost, you get to take a magical DI framework out of the picture entirely.