[okanat]

Not only marketing but also the worst engineering, testing, design, accessibility ... budgets.

Financing open-source projects is hard because anybody can take them and build stuff on top of them to sell at a way higher margin (or they are restrictive i.e. AGPL so nobody builds anything on top of them)

Only well-financed major open source projects are the ones that existed at critical points of time where no strong proprietary alternative with abundant features existed (e.g. Linux kernel, GCC, Apache Web Server) or the ones that are created by major companies as part of their infrastructure and released as a way to shape markets (e.g. Kubernetes, Chromium, PyTorch, React, .NET Core) for the worse or the better.