They're sticky, but not for everything. There are common goods where the market has commoditized greatly because customers are conscious of quality and not provenance. Something like apples.
Google, the titan mega-corp with more money than they know what to do with and a billion+ android devices to ship gemini on and it's made no dent for ChatGPT's consumer growth and adoption. Yet some plucky open source chinese models will?. It takes more than that.