I am pro-mastodon, but the problem there and the main advantage that people always miss with IRC is the matter of having an account or not.
IRC allows a casual radio listener to give instant feedback or join in, but without the hassle of creating yet another account.
This is why I chose IRC for my radio show rather than any of the others with more management options and flexibility.
I considered using Jabber, discord and mumble, but I want to allow anonymous 1-off users to pop in and say hello without an account or extra software.
IRC is just a network at the end of the day and more modern IRC front ends can easily disguise the nature of the beast.
This is why I suggested swapping to the Lounge software so users have a modern experience they expect in 2020 but with the low friction you only get with IRC.
@PDelahanty Coolio, I just ask that you make sure that any guests you suggest to reserve their nickname, to never use the webIRC til after that point.