one huge thing I will miss is the hangouts integration into gmail. I am already missing messages there, even though the discontinuation won't happen for a little while in May.
So now, I have a few people on Allo. Which I really don't like. And guess what? Allo must use some proprietary system b/c I don't get all the Allo messages on anywhere except Allo.
Here is a recent test that I did:
I now have tested 4 messenger apps.
hangouts (no allo messages received at all)
pulse (allo messages received, but warns me to dl allo to view images) allo (which I got the LAST image from Allo, but no previous messages or images)
google message (no allo images messages received)
so basically we're starting to devolve further into this mes s
https://imgs.xkcd.com/comics/chat_systems.png