I like slack quite a bit, but it's not designed to be a replacement for general use case of IRC - it focuses on specific use cases and can be manhandled into other use cases with a lot of pain towards the users.
matrix.org/riot.im seems like a more sensible alternative to IRC - but their systems are overloaded and slow - multi second latency is the norm.
matrix.org/riot.im seems like a more sensible alternative to IRC - but their systems are overloaded and slow - multi second latency is the norm.