Just one correction that Discord does not have to be downloaded as it works in the browser also. And you don't even need to provide an email address at first. As such, the barrier of entry is quite low.
I refuse Discord after eventually having every account get blocked pending phone-number verification. In my country that's effectively KYC (impossible to get a SIM card without govt ID).
Depending on IP and usage, this may happen at any point between registration and several years later.