I would disagree with this, it's the same amount of community effort as it's always been. Big projects have big governance, and receive lots of patches. Smaller projects receive fewer patches. The community generally happens in Discord or IRC or on mailing lists, but it definitely exists.
The real threat to "community effort" are drive-by low-effort LLM-generated Pull requests that decrease the signal-to-noise ratio by a lot and make managing open source projects such a slog