I'm sure some of the reason you haven't got any comment is the subject matter. As all of it had to be scratchbuilt, I think you have shown considerable skill in the making of Ol' Sparky, well done sir !!
Why do you think the subject matter is some of the reason why there has not been any comment?
I have noticed in the past few years a decrease of comments in some threads. My guess is that our society has become a "symbol society" - there's a symbol for everything as if we could not read anymore... Theme parks are filled with symbols, our micro-waves, freezers, washing machines, etc. FB and IG have in part been responsible for that "symbol culture", almost as we could not express ourselves anymore without a symbol (rather sad actually...) So I think maybe it's a lot easier and faster to leave a "like" or a "thank you" instead of writing something down. Don't get me wrong "likes" are important and a sign that the thread as been seen and appreciated however I believe a forum is not a one way road. There should be interaction between members to keep threads (and the forum) "alive".