I spent two years at a large corp working on a classic "lava flow" pattern project. The company needed a way to manage large spreadsheets. They have their own

I spent two years at a large corp working on a classic "lava flow" pattern project. The company needed a way to manage large spreadsheets. They have their own spreadsheet product but it can't handle the size of the data so this one department uses Excel instead of their own thing. This one cowboy coder whipped up a web app on the cloud to start to replace the existing pile off spreadsheets and people with a custom solution and fewer people. It's centered around the concept of Table View which is exactly what it sounds like. Five years later, it's not finished, full of bugs, and also can't handle the large datasets. But they keep throwing devs and money at it. They're probably still working on it. (It was full of wild weird stuff. For instance, there was a "unittest" that generated other unittests, at runtime, in memory.)