We did not make a technical choice to abandon FreeBSD in favor or something else, we made an organizational choice
to abandon external hosting in favor of owned and operated hosting which required a lot of technical changes, one
of which was switching operating systems.
Fun fact: WhatsApp also used to run their servers on FreeBSD. Then Facebook bought them and now they use Linux.
https://news.ycombinator.com/item?id=22028689
t y