The popular article where I read about it referenced: [1] [2]. I guess it is a quite recent finding. But I am no biologist to judge.
[1] Okerblom J., Varki A.: Biochemical, Cellular, Physiological, and Pathological Consequences of Human Loss of N-Glycolylneuraminic Acid, ChemBioChem 18, 1155, 2017, DOI: 10.1002/cbic.201700077
[2] Peri S. et al.: Phylogenetic Distribution of CMP-Neu5Ac Hydroxylase (CMAH), the Enzyme Synthetizing the Proinflammatory Human Xenoantigen Neu5Gc, Genome Biology and Evolution, 2018, DOI: 10.1093/gbe/evx251
That's not necessarily true. For example, humans do not have Neu5Gc[1] unlike most mammals. Having Neu5Gc antibodies is perfectly compatible with human life, yet consumption of lamb, pork or beef can cause inflammation.
I was able to unlink FB my account with help from customer support. I had to provide details about my payment. They then basically deleted my account and created a new one and copied the playlists. There were some issues with Discover Weekly and Daily Mix playlists, but they resolved after a couple of weeks. I guess the process could be smoother and more automated, but I am glad now don't use FB login anywhere.
Another reasons not mentioned : 1) builtin support for complex numbers 2) Fortran compiler usually generates faster code (due lack of pointers it can do more assumptions). But recently I see more and more physics code written in C++
Skimming through the article, I think it does not include cost of labor. In a developed country, my guess is that the cost to have a human worker collect, clean, setup, connect, etc. all the 84 phones would be actually higher than buying a new server.
In third world countries, this could be a different story. I would be happy to send my old phones to Africa to be used at schools.
Well, I did not make it through the last part of the screening. If I remember correctly, you have 45 mins to solve 3 very hard mathematical/algorithmic challenges. I managed to solve only one, despite being a math/cs major with 10+ years of programming experience. Well, shame on me. I guess this way they obtain only truly genius programmers, but I suppose you don't need a top 1% mind to develop your usual mobile app...