Arm is practically as complex as x86... It supports multiple varieties (e.g. v7, thumb, thumb2, jazelle, v8, etc), lots of historical mistakes, absurdly complex instructions even in the core set (ltm/stm), and a legacy that is almost as long as the x86. It even has variable length instructions too...
Only jazelle and thumb v1 are dropped from most v8 non-ulp cores, and then only half dropped: they still consume decoding resources (e.g. jazelle mode is actually supported and the processor will parse jvm opcodes, just all of them will interrupt). We are stuck with the rest as much as intel is stuck with the 8087: It is about time they could do some culling, but not without backlash.
