The OS runs everything; the LLM can be swapped in a second.
(But yes, you will have to tweak prompts+tuning anytime you change models)
It's irrelevant the reason why, the margin any business can take will be constrained by the cost to switch to a cheaper, good enough, competitor.
You are saying it's difficult to switch due to compliance and admin issues. Ok!
LLMs can be swapped easily and open weight models can be hosted to adhere to whatever legal, uptime requirements etc are needed trivially.
The big cloud providers already host and resell open weight models.
The two don't event compare
Basically, companies that are "in the know" and develop software utilize linux as much as they reasonably can. Companies that aren't, don't, but do "use it" kind of transitively through their software.
Where Linux does not hold is in Corporate Desktop IT. Mostly because of inertia of all things. MBAs need their Excel, and let's be honest. These people just... do not learn new tools. They certainly have the ability, but the culture is such that they just don't. So it's not even a choice really. No Windows = No Excel = No serious business person is okay with this.
Maybe, maybe, if your company is mostly developers then you can swing desktop IT linux. But your IT department will fight you, yes they will. And HR will be pissed. And I sure hope your CEO is also a developer. If he's a business guy, well... boss baby needs his Excel. How's he gonna do anything without Excel.
I’m not an Anthropic fanboy - Codex has been my daily coding driver for the last year.
But my point is these companies are building app + model combos that are very sticky. Certainly not as much as an OS, but much more than the “there is no moat” crowd give them credit for.
In reality, there will be many clones of Claude Design, especially if it gains big revenue traction.
Doubly so if you believe the narrative that coding and apps will be "free" and instant to create in the future.