Basically you may choose to drink brand A water bottle, brand B water bottle or tap water. Oh and you might choose the glass water bottle if you use API/Fable.
When we work trial people, 100% of people ask for Claude rather than Codex or anything else.
When I talk to people at non-AI tech events everyone basically says they use Claude and have not tried an alternative.
Developers writ large are actually not that interested in trying multiple tools, they like customizing their chosen tool and tweaking it forever.
I think developers are as susceptible to brand marketing as everyone else. It's why almost everyone has a Macbook.
It's not true, it's just a play for margin.