Yeah, existing techniques work fine if you want to make something similar to existing systems. But it's a shame to write a whole new GUI library and still have

Yeah, existing techniques work fine if you want to make something similar to existing systems. But it's a shame to write a whole new GUI library and still have the same old limitations. Zooming is underused in existing systems, probably related to the fact that it's hard to make it work well with commonly used techniques.