“When you use Signal, your data is stored in encrypted form on your devices. The only information that is stored on the Signal servers for each account is the phone number you registered with, the date and time you joined the service, and the date you last logged on.”
I dropped signal when they dropped sms. I get why they did it but they removed their usefulness for most people. You could. Normally convince someone to use it foe sms and then start using the secure features with that person. Now without sms most people wont even consider it.