This article claims that since most current business uses of LLM's don't require high reasoning (summarization, semantic analysis), that high level reasoning won't be important for businesses, thus they would prefer smaller models, thus open source will win, etc.

This is very naive and assume that all the use cases for LLMs now will remain the same, and the enormous benefits and eventual agentic magic of higher reasoning won't soon overtake the easier LLM stuff in economic value. If OpenAI releases a model that can design, build, deploy, maintain, act as support staff for and do independent research for an entire product line of a tech company, no company is going to prefer sticking to smaller models that can summarize PDFs for them.