> I haven't been able to get them to write hard code on their own, though

For sure, and me neither, for what it's worth. But most of the code I write isn't "hard" code; the hard code is also the stuff I enjoy writing the most. I will note that a few months ago I found them helpful for small things inside the GPT window, and then tried agentic mode (specifically Roo, then Claude Code), and have seen a huge speedup in my ability to get stuff done.