zlacker

Yep (or at least, less techie friends). Strategy is to not have WhatsApp - which leaves plenty of other alternatives (SMS, email, calling, Twitter DMs, whatever) for people who do need to contact me, but Signal is just considered easier by some. I just made sure that I've got groups chats for all my social circles that I add everyone who joins Signal to.

Additionally, taking the initiative for fun activities (or always being eager to join), which -besides being fun- gives people without Signal FOMO, haha.

Edit: Well, "switching" is a big word. They've got it installed, use it to contact me, and some have started using it as the primary means of communication with others who also have it. Most of them will still use WhatsApp even for contacts who are also on Signal though.