The rule of thumb is that if there's a mention of or a link to the Yanko Design website, you know it's a pipe-dream design concept detached from reality. Here

The rule of thumb is that if there's a mention of or a link to the Yanko Design website, you know it's a pipe-dream design concept detached from reality. Here it features the review by YD, so, yeah, that's not just not built, it's not buildable in principle :)