The Vigilant Crypto Snatch software started as a two-user project, where Chris and I just had it running on our respective machines. Over time a few other users came along, and now we have a Telegram group with around 50 members and likely even more users of the software. Initially the software was just a command line utility and ran only on Linux. Then I've used Streamlit to create a little web user interface to simulate triggers. People have asked for Windows support, which was not hard to do with Python. The user basis grew even more, and eventually somebody asked for a GUI. Command line programs are very uncommon on Windows, and the reach of the software seems to be large enough to be of interest to non-tech-savy users.
Given my general preference for Qt as a GUI library, my experiences with Qt 4 at the DLR in 2015 and my recent experiences with PyQt 6 for the autobright project, I was motivated to try this. The installation of Vorta (which uses PyQt) on Windows was easy via PIP, so I have the hope that it will turn out easy with this program as well. With PyInstaller one might even be able to package it nicely.