This is a step in corporate IT that I really cannot fully understand. It seems that every company//startup has to use slack nowadays to pretend to be cool again.
Everytime I have a serious conversation about the productivity gains or losses of Slack though, it is pretty clear to me that it is more disruptive than helpful. It fosters a "Always on" culture, where irrelevant chats are exchanged publicly to advertise how much work is being done. If you shut down Slack and appear as Offline people assume you are not working.
It also seems to me that now that Slack became the norm for communication, I almost don't receive well written emails with well-argued technical discussions anymore. Everything is now a "Chat" that dilutes the technical discussion because it needs to be responded "directly".
I would expect 2018 to be the year where people start questioning the utility of "Slack everywhere" and not blindly jump on the Slack bandwagon because that's what great startups do.
Slacks API and number of systems with built in integrations blows the competition away.
It's a fundamental issue with how Jenkins is set up that I don't know how they can get away with unless they abandon the whole plugin architecture all together. But obviously that's not a solution.