Deleted member 88956
Because R3 is not XE in much deeper sense than stated prism and spot meter. And it were the electronics that took R3 down, not mechanics.Yet the R3 (XE) is considered to be Leicas least reliable model, followed by the R4 (XD).
R4 was apparently closer electronically to XD and both had issues. Leica fixed its problems in later production R4, while Minolta dropped XD for X line with a completely new, cheaper, but reliable design.