It's getting a little better with every release (it seems).
So after reading those encouraging words in the article I figured why not give this a try. So I downloaded the ISO (this time I opted for one in my local language), started VirtualBox again and applied the changes.
I have to say there's definitely something positive to notice here: the OS doesn't crash on my with a weird error message. Instead it asks if I want to boot with the CD, I press a key, the (IMO lame) new Windows logo shows and I can see the CD image getting accessed. After 30 - 40 seconds my HD gets accessed once and then the whole OS just stalls. I waited 5 minutes but the Windows logo remains indefinitely.
Now, I have to admit that my hardware isn't state of the art. However, with this same setup I can easily run Windows 8 within VirtualBox without any effort (apart from mental efforts in order not to lose my sanity). Windows 10 on the other hand does absolutely nothing.
Definitely not the kind of experience which convinces me that this might be a liable candidate to replace my Windows 7 Professional somewhere in the far future :)