This Hempwood product sounds interesting. I actually think that with a bit of tinkering and upscaling of the production, it could become cheap enough to be a viable material for large-scale construction. Definitely, it could replace for example wooden OSB plates for walling. And since the fibers run lengthwise, it could also definitively be used for making load-bearing beams.
Completely independently of this – this spring I was actually really thinking about growing Hemp in my garden for fuel, but although it is legal to grow technical hemp on a patch of land up to 100 sqm, the costs of seeds are prohibitive and there is a risk of cross-pollination with someone’s illegally grown weed so producing my own seeds for future poses risks of accidentally creating hybrids whose THC levels are above the legal limit. It is not worth the potential hassle of discussions with the police. My only hope there is that hemp gets finally legalized for personal use. Until then, I will try and grow hazels, poplars, and willows on my unused land to try and reduce my personal carbon footprint.
Edit: my PC glitched out and the article was initially published with nonsensical title.