Honestly, I'm equally fascinated by the way email has changed. 30 years ago when you drafted an email but didn't send it, it was only on your local machine. There was no SMTP. 20 years ago, it might be a 50/50 shot as to whether you "transmitted" it to your "Drafts" folder if you were using IMAP instead of POP3 to read it.

We really need a way to make it clear to users when, through the normal operation of software, they are "sending" data to a third party (usually the software developer) and when they are not. This is definitely not clear/knowable to regular users, and it's kind of hard to figure out even if you're a computer expert. Even software that "runs locally" now sends innumerable amounts of stuff back to the developer, and they don't always disclose it.

This is a huge privacy problem that is only going to get worse.