Hi Matt, I do not recall that discussion (and cannot easily locate it myself), but my belief is that support for non-LTS versions of languages in our runtimes in general is primarily a consideration of our community's ability to in turn support it. I am for supporting all major versions of popular languages as long as we have a dedicated member of our OW project to support it.
I have not coded anything using .NET for over 10 years so have no idea which versions are popular by app. devs. and would defer to your testimonial that it has value. After all, the owners of a language decided to produce a major release for a reason with functionality some target audience viewed as valuable. It is more than fair to reopen the discussion and discuss the possibility if we can be given a strong case for a target audience that would use OW on that version (and not be able or willing to upgrade to an LTS version). Plus, we would likely need to be assured that we have a champion(s) to support that version if issues come in. -MR