I'm currently trying to create a GUI version (immediate mode library) of a CLI tool of mine and it's mostly a shit show and three times the work of a data-in-data-out CLI tool. Good learning experience, though. I should note that I don't care whether the GUI version has a "native feel" or not (if you have the time to do so, be my guest), only whether it's functional and reasonably fast, since otherwise that's even more work for an open-source tool. Though, when I undoubtedly make the more interactive TUI version later on (ratatui just seems too nice not to try! :-)) it will probably bring a similar complexity development wise.
Then again I'm not into agentic coding at all so maybe the joke's on me. On the other hand, at the moment I need to learn about the data I'm processing, the GUI library/framework I use, and being able to help the people I work with troubleshoot the equipment that collects said data. I'd miss out on most of that if I coded by prompt. Perhaps I'll try later, perhaps not.
Keep making TUIs, or GUIs for that matter.