Is it me or does Microsoft just need to get a decent persistent group chat in office365/lync/skype for business along with a decent api for integrations. As sma

Is it me or does Microsoft just need to get a decent persistent group chat in office365/lync/skype for business along with a decent api for integrations. As small business/startup running office 365 the reason we started with slack was due to the lack of persistent chat rooms in office365. (yammer is just not usable and not sure who it's aimed at!)