This just basically tells you how to mount a disk and install samba. You could equally well apply these instructions to any debian-based system.
The point of all these people doing "Raspberry Pi" articles with basic Linux stuff is to teach people who just bought a Pi and don't know how to use it. The overall point of this device is education.
/r/raspberry_pi is basically overwhelmed with these type of articles. It also features a huge number of posts related to raspberry pi cases. Overall it is fairly disappointing.
These articles are much less informative than explaining how to google for this information.
I think HN is a good place for hackers of all shapes, sizes and experiences.