Awhile ago when I logged in to my gmail account I was asked if I wanted to try AI summaries, I clicked "no" and nothing has changed in my user experience in either the web interface or mobile apps. It also told me I could that I could enable or disable AI features with the Gemini icon next to the settings icon, which it looks like I can still do, at least in the web interface. Am I missing something?

Being "an early adopter" is not proof of anything other than being an early adopter.