Downside
A good first financing should leave more than one survivable state.
If the venture thesis fails but a handful of customers value the infrastructure, the company may become a small profitable business. If integrations and evidence contracts are strategically valuable before scale, the company may become an acquisition candidate. If the commercial entity cannot continue, an orderly open-source stewardship path should remain possible.
The bad state is a large payroll, many bespoke enterprise promises, no reusable core, and dependence on another round to finish customer obligations.