HN, we talk a lot about how Slack has ruined our productivity (eg. https://news.ycombinator.com/item?id=18320968, https://news.ycombinator.com/item?id=16301508, etc.), but nobody has taken steps to fix this. I am building Oliv to take a stand. I am a software engineer turned manager. I am guilty of enthusiastically introducing Slack in my previous organization, only to realize how it killed the pockets of focus time that my engineers need to be productive. Once you introduce Slack in an organization, all communication becomes synchronous, even if only 10% of it…