This is almost 7 years old, but with Inkscape 1.0 a lot of these proposals are now part of its UI. The full mockup lower down the page [1] is essentially what Inkscape looks like for me when I open it up.
7 years old and lives on as promotional material for someone’s design consultancy. Not worthy of Hacker News IMHO.
I was part of that project and I agree with you, I don't know how that came to HN, TBH. That same "design consultancy" (we're not that but I understand the confusion) decided instead to focus on creating Penpot (https://penpot.app)