A founder proudly showed me a SaaS platform he built using an Agentic AI in under 2 hours.
"Software engineering is basically dead," he smiled. "The AI did everything."
I looked at his dashboard. It was a beautiful, functional prototype.
Then I asked him three questions:
"How does this handle a sudden spike of 10,000 concurrent users?"
"What is the Time-To-Live (TTL) on your cache to prevent the database from melting?"
"How much is this going to cost in cloud compute when the AI's naive N+1 queries run at scale?"
He stared at me blankly.
The AI gave him a script. But it didn't give him an Architecture.
We have officially entered the era of "Vibe Coding."
If you are building a to-do list for 5 users, Agentic AI has completely solved software engineering. Anyone can build anything with a simple prompt.
But the moment you need Scale, the shallow "vibe coded" scripts immediately collapse under the weight of latency, security flaws, and cloud costs.
AI has driven the cost of syntax to absolute zero. But it has raised the value of Architectural Judgment to an all-time high.
Anyone can prompt a script. It takes a true engineer to keep the servers from catching fire at scale.