So a question maybe someone can clue me in on here: while the specs on that MCU seem imminently reasonable to me (especially compared to some of the PIC12F and similar I've used in the past) the thing that feels odd is the high clock speed ARM core. Is it really that cheap and easy to drop an M0 core or ip block into an MCU? Why not more RAM and a simpler/slower core? The M0 feels grossly overkill.