Point 2 to me was not about singular/plural, but about companies being animate/inanimate. It turns out that there used to be a very clear preference for "which"

Point 2 to me was not about singular/plural, but about companies being animate/inanimate. It turns out that there used to be a very clear preference for "which", but by now, "who" is winning out in US usage: https://books.google.com/ngrams/graph?content=company+which%2Ccompany+who&year_start=1800&year_end=2008&corpus=5&smoothing=0&share=&direct_url=t1%3B%2Ccompany%20which%3B%2Cc0%3B.t1%3B%2Ccompany%20who%3B%2Cc0 https://books.google.com/ngrams/graph?content=company+which%...