AMD is nice and all, I do have a few computers with them, but they hardly matter worldwide in terms of marketshare.
Samsung is another matter, there are plenty of smartphone brands to choose from and compatibility isn't a requirement.
I remember when this FDIV bug happened in ~94-95, at the time there were plenty of x86 manufacturers. AMD presented probably the biggest competitive threat to Intel. IBM, Cyrix, VIA were all cheap-and-cheerful CPUs that found their way into plenty of office desktops via OEMs.
AMD were a serious problem for Intel around 1998-2001 with their K7 architecture. The Athlons and Durons were incredible bang for buck and owned the desktop high-end mindshare. Anyway that's a discussion for another time :)
Back to phones - Samsung dominate the Android phone space. Time will tell if people move away but history suggests they'll be perfectly fine. People still drive Toyota despite product defects killing people.
I guarantee in 12 months people wont give a shit if the latest Samsung phone is a top performer. Phones are a status symbol. Safety rarely trumps fashion in the consumer retail world.