Qualcom maybe the worst new owner for NXP?
Formerly part of Philips, once the flagship Electronics giant of Europe, the TV and AV are badges for Asians and they have retreated to 1926 and making only light bulbs and health care.
Qualcom will be interested mainly in any IP. It will be a slow death for NXP.
You missed Intel took over Altera, Analog Devices taking over Linear Technology, Microchip ate AVR.
HP spat out its chips into two or three companies and more interested in selling ink than Innovation. HP Killed off the best Compaq lines and all remaining parts of DEC that Compaq had taken over,
It's not about Silicon Valley, but about the visionaries and founders dying and being replaced by bean counters. (In the past in UK, Pye/Newmarket Semi, Ferranti, Plessey, GEC, etc. Mullard was Philips since 1928). Inmos was sold to totally unsuitable owners (was it Thorn?) and eventually to Thomson.
Very many others gone too. Intermetall, MOS, Sylvania, Westinghouse, all important Electronics Innovators once.
East European, Baltic and Russian outfits you never heard of from the USSR days.
Mighty RCA gone in 1986, their brand and Telefunken eaten by French Thomson TSF and like Grundig and Akai a meaningless badge.