Within a year of April 2023 (i.e., by April 2024), AutoGPT‑style agents were still experimental and unreliable, not robust tools for rebuilding complex enterprise software.
AutoGPT itself was widely covered in 2023 as an autonomous agent framework, but contemporaneous reporting emphasized severe limitations: it frequently got stuck in loops, hallucinated, and was explicitly described as not production‑ready and better suited as a sandbox or proof‑of‑concept rather than something to run real systems on. (en.wikipedia.org) Broader surveys of agentic AI note that, even as of 2025, there are few real‑world applications of AI agents, and controlled studies found that such agents generally fail to complete the majority of tasks in simulated software‑company settings—indicating that robust, autonomous end‑to‑end software engineering was still out of reach, not something hundreds of solo teams had already accomplished a year after April 2023. (en.wikipedia.org)
The strongest real example in this direction is Devin, an "AI software engineer" announced in March 2024. Devin can autonomously complete some software tasks and build small applications, but reporting and benchmarks portray it as a tool that can handle portions of development work with non‑trivial failure rates, not as a system that single‑handedly rebuilds full, Salesforce‑ or SAP‑scale enterprise stacks for solo developers. (en.wikipedia.org) In parallel, while there are case studies of one developer using ChatGPT‑style tools to build and scale relatively simple SaaS products quickly, those are niche applications, not full‑fledged replacements for major enterprise platforms. (vocal.media)
Finally, industry anecdotes through 2023–2024 still describe companies struggling even to clone existing Salesforce orgs or to replace Salesforce with internal tools, often requiring teams and consultants rather than "hundreds of one‑person teams" succeeding with agentic AI. (reddit.com) Given the lack of any documented examples of solo, agent‑driven rebuilds of major enterprise software stacks by April 2024—and the consistent evidence that autonomous agents remained immature at that time—the prediction that this would be achieved "in less than a year" from April 2023 did not come true.