Google Glass was not arbitrarily good technology. And, while the glasshole thing may have been a factor in its demise, if you look around privacy factors don't much deter the use of anything people actually find useful.

The GDPR has been passed since then. At least in the EU, it would be illegal for Google to gather video of people.

You don't need to store video for AR to work. Besides, people take video and photos of others all the time and upload to the Internet without permission of the subject whether that's technically allowed or not in a given country.