True. Many years ago we played some of the battles from my campaign book at my local club. Too Fat Lardies also used some of it for their Chain of Command Early War lists that I helped them with.
But yeah, it's such a "niche" part of the war that collecting early war Poles give you an army that is not playable for the rest of the war whereas German miniatures can beused for the entire war if you don't play with "button counters" in your group. This limitation is off putting for many gamers...