> trick I’ve developed, when giving my contact info to new people, is to enter my phone number on their smartphone myself, and install Signal for them

I too have no social media nor smartphone, but this made me cringe...I TOTALLY understand his pain-point and it's tough to not be on Whatsapp, but to go above-and-beyond for privacy reasons, and then install an app on someone's phone without their consent?

But it is a great article! I love the watch and it's something I'm going to look into for myself!