All these comments about bridges being a "solved problem" or having "negative practical value" or how it doesn't cross anything... It's a tech proof of concept

All these comments about bridges being a "solved problem" or having "negative practical value" or how it doesn't cross anything... It's a tech proof of concept. That's what it is. It says what they're testing right there in the article: - improvements in the robustness of the digital design tools, - closer alignment with the numerous structural design and circularity-related improvements, - tighter integration with robotic concrete printing parameters - extensive calibration to improve efficiency of production of almost double the number of blocks in less printing time - after two years and in its second iteration, Phoenix adds a largely reduced carbon footprint and permanence according to building codes along with many other further improvements So, to put it in tech terms, this is the second iteration of a prototype technology, that is now safe enough to be released as an alpha build (in the form of a small public work of art in a kids' playground). They will now iterate again and in the future try for something bigger, presumably. Not everything can be on a grand scale from the get go, more so unproved new infrastructure technology. Like, you wouldn't have used Docker ver 0.1 alpha in production, right?