Ok so I've used kik for years (I have a pen pall in Germany, we both went through the transition to and from university together.) Their app was delay tolerant and had decent read receipts which was amazing when I lived in the country side with my parents and had a worthless internet connection. That being said...
kik never built a desktop application, if you didn't have your phone you couldn't even know if you had a message waiting. Even if you went through the trouble to run an android emulator it deleted all your messages each time you switched devices.
Kik got pretty caught up in the whole bot thing, and kept cutting the legs out from the third party developers that was stupid.
They were so weird about groups, and the 50 person limit per group made them pretty useless when combined with the reputation the app had.
discourd really kind of ate their lunch (and personally I really don't like discourd but at least I can connect to it with pidgen and join the popular groups.)
EDIT: oh its for securities fraud with their stupid crypto currency that literally no one used? That's dumb.