For me, it's WikidPad, a personal wiki, written in Python. I was all set with Ubuntu about 2 years ago, but had to switch back to Windows 10 because WikidPad, w

For me, it's WikidPad, a personal wiki, written in Python. I was all set with Ubuntu about 2 years ago, but had to switch back to Windows 10 because WikidPad, which had all my notes in it, just didn't work properly under Linux. I started missing doctors appointments because I couldn't see them. 8( There were breaking changes to Python, and to WxPython which made all of the GUI forms break, and I couldn't figure out how to fix it. This has personally turned me against Python, which seems to have a culture of moving fast and breaking things, without regard to the price users pay. The Windows executable distribution works, and is likely to work for the next decade. There's a stability to the Win32 API and their focus on backward compatibility that Linux just can't match.