Gotta be honest stringsinger, never really thought about it but you are right,the influence versus well known long neck players is very disproportionate.
Having said that there is obviously a big market for the long necks? Took a look on my favoured banjo supplier (no personal connection) and he stocks quite a few. Never personally played a long neck but I can tell you that his Grafton 5 strings are fantastic for the money. Like I said no connection.