Well, maybe this is one for the wardroom, as there seems some (semantic) confusion between Alternative History and 'never built/were'. IMHO, Alt History, seems very much what folk dream up, either for their own projects here, or on other Forums. 'Never Build', or as it should be 'Never Built' (as the first seems to be more advice, and maybe good advice at that
) seems more projects folk have found out there in the real world, which never got past the drawing board, or maybe a prototype.
At this stage, splitting the thread into two may be possible, but would still leave stuff stranded either side. I'll leave it at that for now and see what the consensus is