Revolt isn’t new. Matrix and revolt are around the same age and are both not even feature competitive with Discord. So until there is a fully featured truly open alternative to discord, there will be still others trying to take discord’s audience.

Most banks restrict custom ROM and root access devices for security purposes. Same with MFA apps. I get it. From an IT security perspective, restrictions on software compatibility limit the number of failure points. Even if you find a custom OS that is more secure as an OS, it is installed through opening up your device to security risk and there is no real requirement for you to close up that security risk afterward. My company has made the same choice to restrict supported platforms for our services.

McDonald’s app restricting the OS is probably some security decision they made because it’s more secure even when they probably don’t need it though.