Long-term support for custom entropy sources

[mwriter]

In Golang, support for custom entropy sources is being systematically canceled:
golang/go#70942
golang/go#76856
Under the guise of security, of course. And I have no doubt that this process will cover absolutely all crypto algorithms. I don't have adequate answers about the reasons for what is happening, I don't see even the slightest desire on the part of their team to discuss what's happening, consequently, distrust of their further implementation is growing and the question arises of finding reliable alternatives.
Therefore, I'm interested in the question: do you plan to keep all the details of your current implementation in the long term, to support custom sources of entropy?

[mwriter]

I would also appreciate answers to the extent to which your project covers the implementation of the stdlib. And I would especially be grateful to the lists of other reliable projects that also successfully cover some crypto points.