[ziml77]

You're probably right on that. I now weigh my options to try to find a middle ground between impossible to change because it wasn't designed for change and impossible to change because it was designed for too many future use cases that will never happen.

[ahartmetz]

IME, extensible code comes from thinking of possible extensions and then not getting in their way, which usually just means keeping it simple. Easy to say but hard to do.