It's taxing fair market value of the land. So, if you erased a skyscraper in downtown, how much would that barren plot of land be worth? Tax all of the value there. It's one of the only known taxes that doesn't negatively distort the economy
I'd say that the difference was the systems behavior in the presence of IO, and it's pretty important in my experience. Micro-batching systems hold up processing while waiting for IO but proper streaming implementations continue using cpu for elements at other points in the stream, very roughly.
Having successfully replaced a legacy system one time we got it to work by turning the legacy system's business logic into a library that the new system could use. This key is just replace the underlying architecture without reimplementing years of work.
In looking at the photo you observe the system and collapse it. There is no difference between your eye and the camera. Both connect the quantum system to your conciousness.