I think the more obvious lesson in this (which Astropad appear to have stunningly missed), is that if your product’s role is fixing a (perhaps obvious) deficien

I think the more obvious lesson in this (which Astropad appear to have stunningly missed), is that if your product’s role is fixing a (perhaps obvious) deficiency in another product, then you have a significant risk that the other product will improve to the point of making yours obsolete. If your business model can be turn on its head by another product implementing a (perhaps even trivial) feature, then you simply don’t have a very strong business model.