it sucks when Apple gimps file sharing for everyone by refusing to use standards

Fixed it for you. If Apple supported RCS this wouldn't happen. But I guess you prefer to follow Tim Cook's monopolistic solution and buy them an iPhone /s.

RCS doesn't have a cross-platform end-to-end encryption solution. For cross-platform communication, cross-platform 3rd party solutions such as Signal work well.

@RandomBit @jmcs I prefer #Matrix.

I don't find #Signal or #Telegram (which is worse, it's basically a honeypot) to be particularly secure, but I don't see anything other than something like those platforms catching on with the masses as a sort of #USA-centric #Whatsapp-style replacement for text messaging.

Both #Apple and #Google need to come up with a consensus on the successor for #MMS, or else I could see another platform or app replacing both.

What security issues does Signal have?