Ask HN: Why are websites and apps still running legacy code?

A Hacker News user asks why businesses continue running legacy code despite AI making re-implementation easier, citing Fandango's 15+ year-old ticketing site as buggy and costly. The user argues that rebuilding would recoup costs in months, but acknowledges the complexity of software dependencies.

Now that apps can easily be re-implemented with AI, what is keeping businesses from rebuilding them ? I tried buying tickets with Fandango, and their site is 15+ years old. The ticketing and checkout experience is buggy & leaking tons of money . I understand Fandango the businesses has many software dependencies & surfaces: web app, mobile, some data feeds, APIs -- lots of custom spaghetti code. I'm not trivializing their business. Still, the cost to rebuild and deploy is much lower than what they are losing. The rebuild cost would recoup in a couple months. What's keeping businesses from rebuilding & fixing their apps? Comments URL: https://news.ycombinator.com/item?id=49248463 https://news.ycombinator.com/item?id=49248463 Points: 1 Comments: 4