Someone at work vibe coded a replacement for a entire third party SaaS that we were using in a week. Their version is better.
It wasn't one-shotted of course but I don't think there's much difference in the outcome between one-shot and like 100-shot over a week. That company is still doomed.
Think of something like Trello. Who is going to pay for that when you can easily vibe code something superior (yes you really can now).
Open source companies somehow make money off enterprise contracts. People still don't want to be on-call if something breaks, or have to manage servers and backups. But making money off SLAs to implement new features will probably be a thing of the past.