@ve3mal glad you enjoyed the read and that you also got to running #AlpineLinux on the desktop! Lean, mean and FAST!
But yes, the post is four years old when Alpine was, I think, on version 3.17. A lot of things changed since I wrote, including the fact that full disk encryption is a given option right in the installer script - a vast improvement.
I probably should write a new guide for it, better yet, make a video about it, since my last one showcasing 3.17 in Peertube got deleted.