It is dying because the telcos can't get access to the same range of network equipment that their competitors using open GSM / 3GPP standards can and they've all sorts of hassle getting first shout at handsets and other gear.
Also CDMA One (IS-95)/ CDMA 2000 (IS-2000) should be confused with the generic cover of CDMA (Code Division Multiple Access) which was around as a concept before either Qualcomm system for example it is used by GPS satellites and is also uses in 3GPP standards like UMTS (also known as W-CDMA).
Where the GSM family is standards absolutely won out is that they are an open, totally modular system where you can easily implement multivendor platforms using all sorts of equipment from loads of different companies without that much difficulty.
The other system is far more proprietary at least at the radio interface level. (Switching and data centre stuff is more or less the same for any telco network).
ALL of the CDMA One / CDMA 2000 systems will cut over to pure LTE eventually with VoLTE for voice. That finishes their dependency on proprietary gear.
Biting the hand that feeds IT
