How about "I need to message other people in a way that doesn't make everyone I know have to change the current way they do things".
I wasn't necessarily referring to iMessage. But, WhatsApp, Telegram, Signal, Slack.
To be fair, I've also failed to find a list of supported apps. The best I found was: https://www.reddit.com/r/PINE64official/comments/okjeuk/apps...