But there are also many points, where the CMOS logic always wins out:

1.
CPLD,FPGA are often only 3.3V or below, CMOS can work with 5V, 12V or 15V.
E.g. for 15V you need only a level converter CD4504 for the serial bus and some CD4094 for the outputs and CD4021 for the inputs.

2.
placing a common serial bus and some CMOS circuits exact on this place, where the IOs are needed may cause an easier pcb as a single big FPGA in the middle of the pcb and tons of wires around it.

3.
FPGA need often more current as CMOS logic circuits.


Peter