The less you use the new features, the less benefit you get from them. You could stick to K&R C and get no benefit at all, but that would be equally as foolish as what you are doing.
The new features are there to improve your experience, and to make your code more reliable. When you have a choice between old and new, new is usually better.
Sticking to K&R, you would have as many bugs and crashes as other K&R code. Sticking to modern C++ makes most of such bugs impossible. That is progress.
You can stop learning and take up complaining at any time, as you have done.
But you can also start learning again at any time. Now is always a good time for that.
