To me, I wonder if it would be possible to combine forces, and encourage folks interested in the PLDI topic to post their questions here. I wonder if that might work better than creating a new site. The topic seems largely within the scope of the existing CS.SE site and thus I have the impression that a community interested in that topic could be accommodated here.
I have seen the comment suggesting that "these questions receive little attention" when posted on CS.SE, and to me it seems like one natural solution would be to have people who are interested participate here. That comment also mentions "these questions [..] are of questionable on-topic-ness". It would be helpful to elaborate on that. That post mentions the following as types of questions that would, it suggests, be off-topic elsewhere:
- Questions about best practices in the design of languages' syntax, implementation, or major design choices (such as paradigm or type system)
- Questions about general strategies for optimizing languages
- Questions about ways to implement particular language features
To me, the last two seem likely to be on-topic here. For the former, questions about "best practices" are often a poor fit for the Stack Exchange format (1, 2), but in many cases can be asked in a more productive way after more thought and focusing. Questions about "design of languages' syntax, implementation, or major design choices (such as paradigm or type system)" seem likely to be generally on-topic here.