I think taht Picasso is actually an APU (CPU+graphics) and before Ryzen/Zen they never supported ECC. So, I think that ECC is for PRO APUs is an improvement.
Incorrect; there were a bunch of AM3(+) boards which advertised ECC support back in the day. The IMC of AMD's desktop processors always supported ECC if I'm not mistaken.
I guess it depends on what "supported" means in the context of the mobo. I'm always afraid its going to mean that I cannot enable scrubbing, etc, if the cpu is not "supported"
Incorrect; there were a bunch of AM3(+) boards which advertised ECC support back in the day. The IMC of AMD's desktop processors always supported ECC if I'm not mistaken.