I have always been curious about this. Did you get them to use other services or did they stubbornly refuse and you just accepted it? I am talking using Chrome, using Windows, using social media like Tiktok or Facebook or Instagram, etc. Bonus points if you have kids because that is even more work in the privacy realm
At the time I was changing to signal, I only had google messages on my desktop, so I would answer accumulated messages at home.
There was no cell service at work so SMS didn’t work, but I could use wifi.
In modern times, we have RCS so it’s kind of not really a problem anymore, but everyone I know uses signal now anyways.
I didn’t make it hard, I got Telegram and Matrix and met people halfway where I could. But naturally everyone I know just settled on signal since it also did SMS so it replaced an app rather than added one. Plus id didn’t feel like a “sign up” since it just worked. Those days are gone but the network effect is already chugging along.