Right now we have a rule in place that limits answers to language implementations that were made before the question was posted. This makes sense, because otherwise I could invent a programming language after a certain problem was posted that solves the problem in 0 bytes.
However, I feel like another facet of this issue has been left undiscussed so far: old questions.
Languages change over time, and new (legitimate) languages are constructed all the time. If I want to post an answer to a year old question however, I must track down which version of my preferred programming language I can use, if I can use my language at all! This is especially problematic for esolangs, which often don't have such... rigorous versioning.
Should we perhaps lax the restraints for new languages/versions for old questions? If yes, how?