Stickyness absolutely helps. But it won't get you anywhere close to a MAG7 operating margin. I think we are already seeing the start of price wars. I cancelled my ChatGPT subscription once i realized Gemini Pro was included in my Google Workspace and never looked back for a second.
Except resources won't be plentiful for a long while since AI is only impacting the service sector. You can't eat a service, you can't live in one. SAAS will get very cheap though...
They are not free, they are paid for by taxes. And in pretty much all countries, irrespective of funding model, these services have increased in price much faster than general inflation. This is the Baumol effect in action.
All chat apps look exactly the same and have exactly the same features. The friction is basically non-existent compared to email services, social media, web browsers, &c.