I work in a small R&D team within a larger engineering organization. I use Python, and it has spread to the rest of my team. However, I've tried to share tools that I've written in Python with the engineers. The problem is that I have to hand-hold them through the process of getting Python working on their computer at the level of detail of: Here is how you find the Python editor. Double click on it. Click on "open." Find the Python file. Click on "run." Click on "Run Module." Or you can press F5. No, you have to be in the editor when you press F5. Now do you see that a window just appeared? Look at the entries and buttons in the window...

It's really quite harrowing. Whereas if I put the same thing in an Excel file, they can bring it up themselves and I can quickly walk them through using it.

And I don't think my UI's are all that bad. But going from throwing together a simple Tkinter GUI, to something that is totally user proof and self installing is actually quite a lot of work.