The biggest issue, is that the whole stack keeps being dependent on external nations, as per the companies that actually contribute to FOSS with big money. https://insights.linuxfoundation.org/project/korg/contributo... Then it is Go (Google), Java (Oracle, IBM, Red-Hat), .NET (Microsoft), Rust (Amazon, Microsoft, Google), Typescript (Microsoft), C and C++ (Red-Hat, IBM, Microsoft, Apple Google, ...), and so on.
I can't seen any reason for this to be "the biggest issue".