Indeed, but only a tiny handful of companies have been successful with that business model, and they mostly make margin on things you'd have to pay for anyway like cloud services. No company is going to pay e.g. $15/user/month for Jira when they can get the same thing for free - better even. And yes it isn't an exaggeration to say you could vibe code something better than Jira. (Especially because that's a low bar!).

I'm kind of surprised nobody has done that yet actually. I guess Opus 5.5 has only been out for a very short time...