We have good unit economics. The riskiest, most terrifying thing we've done is start with our own hardware.
For dev focused infrastructure, what we need to do is attract a lot of devs, get them to take us to work, and then help their employers build better stuff over a long period of time. This takes _forever_ because companies-with-procurement-processes are designed to not buy critical infrastructure from startups.
It's working for us so far, even if it's not for you yet.