Earlier quoted context omitted.
GChat used to be great - it was simple, relatively lightweight and quick. Then it was rebranded Hangouts and became a little muddled and unwieldy for a brief period when Whatsapp was ascendent which nearly overnight caused my entire group of friends to switch. You're right about the IM apps being not great. This and the poor state of desktop email clients on Windows and Linux are my pet hates
I'm sorry, but what? I've had facebook messenger, gchat/hangouts installed on my phone for some time. I don't know if I'd call it great, but I have a hard time arguing that it doesn't immediately solve my instant messaging needs. What exactly do you want that gchat or facebook messenger doesnt solve?
Whenever I’m stuck using a centralized service (Twitter, facebook, some web forum, whatever bullshit IRC replacement businesses are buying this week, ...) their client invariably does something different than what many people want it to do, but we have no recourse because everything is locked-down proprietary bullshit, even though most of the messages are plain text and could have been delivered just fine by open protocols in 1990. Not to mention these apps are all poorly designed resource hogs that spy on everyone, inject ugly ads, and burn mobile battery.