It is not related. I've already said : even a Nexus 4, with excellent CPU (quad core Snapdragon Krait @ 1.5 GHz) and 2GB of RAM shows the Android 4.2.2/4.3 multitasking limitations after some (2, for exemple) hours of use, when some softwares (including native ones) are closed or restarted by the system. While a Psion with ARM CPU @ 36 MHz and 16 MB of RAM could/can multitask a lot better. Because Epoc 32 was designed with pre-emptive multitasking as a main requirement.