HN user
I check Twitter maybe 5 times a day. "Algo ordered" tweets show if I won't check my feed for two days. I'm from Slovakia so maybe that's the reason - Twitter is testing different features in different countries. In fact, Slovakia has new FB feed for months now.
From time to time, it shows 5 random older tweets on top. But everything else is in chronological order.
You can still switch between algorithmic and chronological order on Twitter. At least on their mobile website
Home 3D printers. I think they should still be around but I imagined that they would be more widespread and practical.
kottke.org is just a collection of interesting links with short description. But I like it :)