Yikes.
could you expand on this? who is "we" and what are those explicit and local relationships? are you talking about an opensource ecosystem or a private enterprise?
In my experience this is often what happens when a new community is spawned. E.g. when nodejs started it was there was always one single implementation of that thing I needed and it was reasonably up to date with the rest of the things around it (including the runtime environment, of which there was only one or perhaps two mayor versions of). As time went on more people started to contributing, often with different levels of commitment.
Often "modern" gets conflated with "young". Almost by definition, young communities don't develop the same kind of problems of mature communities, yet.
There's a brief note on singleton problems, so that might be an issue with code that uses them more, but the example given (listening on port 80) is also more or less language independent, since there is only one port 80 whether your code uses singletons or not.