Uber grew extremely fast in its initial years and that resulted in large number of teams starting NIH projects to "make themselves useful". Uber switched to Sla

Uber grew extremely fast in its initial years and that resulted in large number of teams starting NIH projects to "make themselves useful". Uber switched to Slack a while back, in addition to laying off a sizable chunk of the engineering workforce, and it didn't really collapse on itself. Nowadays, there's a lot more support internally at Uber for buying off-the-shelf solutions instead of trying to reinvent wheels.