I'm sorely tempted, but I'm not. I have a 1949 Elmar f3.5, a current Elmar-M, and I'm about to get a Jupiter-8. That's more than enough 50mm's for me.
I have used the M-Hexanon 35mm and 90mm, so I'm familiar with both the optical and build quality of these lenses. Leica could learn from Konica...
I think many people don't know the heritage of Konica - back when, the Japanese govt. quality institute used to use Konica as the benchmark by which all other lenses were judged. They are superb.