32 bit is still very common for smaller CPUs that aren't in the "application processor" class.
They are cheaper because they use less area, and they're also more memory efficient because pointers are all half as big. On these CPUs you don't have 4GB of RAM so you don't need a big address space.
They are cheaper because they use less area, and they're also more memory efficient because pointers are all half as big. On these CPUs you don't have 4GB of RAM so you don't need a big address space.