I can imagine. The 7 was still an LTM camera. But this big honkin' f0.95 lens would put a strain on the threads, and the lens dwarfed the mount point. Even then, the lens being so heavy, if you turned the focus to the end, all that weight would probably start to turn the lens off the camera. So instead of a thread mount they added a bayonet type mount, and the original lenses have a set of tabs on either side that need to be hooked into the camera, which added stability, and kept the lens from twisting. But the lens could only be used on the 7 series. They did also make a TV version of the lens.
This lens has been converted to M-mount already, and appears to still have the RF coupling (But not 6-bit encoded). I don't have an M-mount RF camera to test that part out. I'd take it to the local camera store, but they don't let you try out the Leica's in the store like you can with the other cameras. I wonder why?
So I await my Hawk's adapter with bated breath. I looked at the other M-mount adapters, including the cheaper helicoid clones. But with the f0.95 being so big, I thought I'd better go with the adapter that has the extended tab when dealing with close focusing. I ordered both the adapter and a cheap-o lens cap last week (Can't believe the guy didn't have a lens cap on this when he shipped it). Both had an earliest estimated arrival of the end of next week

However, the cap arrived today, so maybe the adapter won't take as long either.