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.
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
On a slightly off-topic note, I've been playing Deus Ex: Mankind Divided the last few weeks, which takes place in Prague, so this headline made me wonder for a moment if I was in-game...
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++
