Discussing switch from gitter to slack or ...

As all well know, official way for asking quick questions and discussing product at hand is [gitter](https://gitter.im/karma-runner/karma) channel, but it is somewhat limited in capabilities.

I looked around on the web to propose something, that might be more efficient.
1. Slack:
1.1 Free package has some limitations as well, like searchable messages amount, but if one would compare it to Gitter, then I doubt, that it would be better on that part.
1.2 On the plus side it has different integration options.
1.3 It could support private channels for different team groups.
1.4 More information can be found here: https://slack.com/pricing/slack-for-teams
2. StackOverflow chat room:
2.1 Another good option.
2.2 Long lasting transcript
2.3 Code formatting
2.4 Stackoverflow in place to reference maybe some questions, that might give response to the one who asks.

If anyone is interested in switch, then please leave comment or discuss, so that your opinion would be known.
Thank you.