As far as I know, this is a general Android question and not DAVx5-specific. Currently, Android tools don’t work with Java 11.
I don’t use WhatsApp since some years now and almost all of my friends have at least one other messenger; or I just use SMS/email in some rare cases.
I also use Telegram (insecure by default, but useful for groups), Threema (I like that it’s paid, so you know their business model; but push doesn’t work without Google Play services, so messages are late for up to 15 min) and Signal (most preferred after XMPP).
@rfc2822 Personally the most messenger/social media I like is telegram. Despite we cant say that it is social media for sure, but it is going to become sm!
Thanks dear Durov for security!