However, if you previously had remote content disabled in Mail.app on iOS or MacOS, it seems that you have to do it again after upgrading. By default, Protect Mail Activity is enabled, which allows remote content to be download, albeit in the background. If you want to fully block remote content, you have to disable Protect Mail Activity, and enable Block All Remote Content. This works in both iOS and MacOS.
But the most interesting and telling reason for why TVs are now so cheap is because TV manufacturers have found a new revenue stream: advertising. If you buy a new TV today, you’re most likely buying a “smart” TV with software from either the manufacturer itself or a third-party company like Roku.
It is so creepy when Roku TVs show a message to “continue watching from the beginning” when you’re watching something on an Apple TV. I assume the TV is constantly sending frames of whatever is on screen to Roku servers for analyzing. It seems unlikely that the TV is capable of doing this recognition on its own.