Not only are loading times and total network usage ridiculous, sites will continue to violate your privacy via trackers and waste your CPU even when background idling. I've written about these issues a few times in the last few years, so just sharing for those interested:
It's been said a thousand times, but the "open" in openai becomes more comical every day. I can't imagine how much money they will generate from such a tool, and I'm sure they will do everything possible to keep a tight lid on all the implementation details.
A comparison of CPU usage for idling popular webpages: https://ericra.com/writing/site_cpu.html
Regarding tracker domains on the New Yorker site: https://ericra.com/writing/tracker_new_yorker.html