How is it different from the situation in other languages? Especially the ones like C and C++ that don't have a canonical source registry either? (Not a rhetorical question)

Normally yes but f.ex. my favorite Elixir has a community that very strongly prefers and orbits around singular solutions of thorny problems. You will not find many ORMs / DataMappers in that ecosystem, it's one that has been super hard worked on and nearly everyone accepts it and loves it and contributes to it when the need arises.

Meanwhile in many other languages, Golang and Rust included, there are many ways to do the same thing. That introduces difficulty to keep well up to date.

But I can easily agree this point gets very weakened after you have worked with the language for a certain amount of time and on.