Why is it so terrible to say the GXR did not meet my needs?

I've been thinking about a used Leica M8 as well but it is hard finding some 2.8 lens which equals 28-35mm and at the same time have close focusing 0.3m or shorters. Seems near impossibly to find. Both XF 18mm and NX 20mm have ok close-focusing. I guess I'll wait longer to decide what direction I take unless I find the right lens for the M-mount.