wolfie: So even the most expensive DSLRs have AF systems with built-in limitations that even the cheapest mirrorless camera is free of.
Thats not entirely true anymore... A number of mirrorless AF systems use PDAF or a combination of PDAF and CDAF (hybrid). Nikon's implementation of live view only uses CDAF, making it quite sloooow. Canon at least has DPAF(Dual pixel AF) in its live view!!!