[bearjaws]

This is a very dumb reason.

100% of them fail because they don't have product market fit, and the coding is the easy part, selling a product is actually really difficult.

If I built an internal chat app for a company of 1,000 people, I never need to worry about scaling to 50k users.

Most companies don't have any facet that needs to scale to the level of Slack, Google etc.