I recently wrote a blog post about exactly this, and I agree with your perspective. Vibe coding helps with showing other people your idea and get them to understand it, try it and, most importantly, help you fail fast. But as the product matures, the gains of using LLM's and agentic engineering will go from 10000% efficiency to something like maybe 30(?)% productivity gain? Which is still awesome, of course.

"The real test of Vibe coding is whether people will finally realize the cost of software development is in the maintenance, not in the creation."

https://blog.oak.ninja/shower-thoughts/2026/02/12/business-i...