Well, that's a hard post to follow!
I was going to say something off the beaten path, anyway:
We're always frustrated when we can't have the toys we want to play with, but certainly there are alternatives to frustration – you can buy a number of fine lenses to use while you wait for that 50 Summilux.
I have a couple of current-model aspherical lenses, but these aren't really my favorites. My favorite 50 is a pre-ashperical Lux, which is neither as sharp wide-open nor as contrasty as the one you want – but IMO somewhat the better for those 'failings.' For a reasonable amount you can buy an f2 Zeiss to use while waiting, and it will be as sharp & contrasty as the lens you're waiting for. Or for chump-change you can experiment with Noktons. The 1.5 is under $400, & you can keep it for use in sand, thunderstorms, & threatening neighborhoods, when you don't want to take out the Lux. Or maybe play with the 1.1 Nokton, for 1/10 (!) of the price of a Noctilux, just to see what it'll do.
Another fine lens at give-away price is the 40mm Summicron-C.
In other words, there's lots to do besides fret until the next state-of-the-art lens arrives. I'm in the same position: 35mm is my preferred focal length, so I'll probably try out the next version of the 35 Lux. But I'm not inhibited about using fine older lenses in the meantime (35 Cron v1, an amazing lens; 35 pre-a Lux that wins no medals for resolution, but its wide-aperture images have a special quality).
All of these will bring you good interim experiences with your M9.
Kirk