> That's true. The biggest takeaway, though, is the assumption that people will care to port mainstream software to OpenBSD when virtually nobody using that software runs OpenBSD & their community discourages amateur programmers. It's not a wise expectation. Instead, they should expect to have to port it all themselves to their particular OS of choice while being thankful when people do it for them with great portability.

You got it a bit wrong or didn't read the linked github issue in detail. I run OpenBSD and I ported Dart to OpenBSD. I tried to work with upstream (Dart team at Google) to incorporate my changes or work on a way that allows them to take the changes and for me to maintain the code long term. In this specific case the upstream works behind closed doors which makes it hard to cooperate on things like this.