It's been argued that the deal structure of companies, particularly unicorns, has begun to look like debt[1]. Low interest rates and easy money has created debt. Massive bubbling amount of debt. Crashing debt bubbles is not fun, just ask anyone that lost their shirt in 1929. There is a paper[2] from this past June that goes deep into this, highlighting how and why debt bubbles are so dangerous. TL;DR? At least checko…
The unique feature of debt vs equity is that debt has a concave investment profile; you know exactly what you should be getting upon maturity (principal + interest payments). Equity has a convex investment profile; you get the residual value after subtracting face value of debt from the enterprise value.