Most of the people I’ve introduced to Linux don’t even use the shell. Beginner-friendly Linux distros are perfectly usable without ever touching a terminal, just as most people use Windows without ever touching PowerShell (or worse, the Registry Editor).

About the technical part, Signal uses the Signal Protocol instead of RCS. (Google also uses the Signal Protocol to encrypt some RCS messages in Google Messages, but the Signal Protocol and RCS are not the same thing.)

Make sure your rice isn’t from Arkansas, Louisiana, or Texas, because rice from those states are contaminated with higher levels of arsenic.