A few years back, someone at corporate made an Excel based "program" for planning our trade shows. It was the most rage inducing rickety ass bullshit contraption I have ever had to deal with. It was basically a data entry wizard GUI for a spreadsheet. But it would crash every 2-3 entries, and lose all the data that had been added since the last save. The only way to save the data involved closing it and restarting it. So I had to close/reopen after every entry just to keep from having to risk redoing it all multiple times.