i don't think that's really any brand loyalty for OpenAI. people will use whatever is cheapest and best. in the longer run people will use whatever has the best access and integration.

what's keeping people with OpenAI for now is that chatGPT is free and GPT3.5 and GPT4 are the best. over time I expect the gap in performance to get smaller and the cost to run these to get cheaper.

if google gives me something close to as good as OpenAI's offering for the same price and it pull data from my gmail or my calendar or my google drive then i'll switch to that.