[fragmede]

IRC is a technical detail like SMTP or TLS 1.2 (or XMPP), and should be treated as such. That there are numerous pre-existing clients is beneficial for those who already have a preference, but as evidenced by Slack, the number of client programs available is far from the most important feature.

It would be really neat to create a IRC server that bundled supported web, desktop, and mobile (ios and android) clients with first-class support for that last 5% of features, but I'm doubtful of how much money there really is to be made. People are cheap, and Slack is "free" - I mean, it's actually not free for the organization, but users don't pay a monetary price to download the client to use the system, so I see charging users money for high quality IRC clients as an uphill battle.