First time heard about Scenix/Prallax_Propeller. Maybe it's more complex for DIYers or not as well-known as Raspberry Pi? AM335X has PRUs yes, but it's not MCU

First time heard about Scenix/Prallax_Propeller. Maybe it's more complex for DIYers or not as well-known as Raspberry Pi? AM335X has PRUs yes, but it's not MCU anymore.