Protocols don't go bankrupt and close up shop. They'll still be around in 10 years.
Protocols don't magically pull the rug out from under you, dictate how you use them, or suddenly change features you want and need without you having any ability to remain on the old system. They don't suddenly up the system requirements or discontinue support for old clients. I can still email from any device I ever could, palm pilot, powermac, whatever. Meanwhile your favorite app is dropping support for Android 4 or whatever 24months after release. Or app xyz no longer works on a 2 year old iOS.
Protocols are something I can rely on. Businesses fly by night. I'm not going to start using Discord now and have it be gone this time next year, I've been using IRC for decades, and I'm going to keep using it. It works perfectly, everywhere. Especially if I have mosh and a server running my irc client somewhere else.