It’s not just Leica. The interface between users of electronic equipment and the manufacturers has sucked for as long as I have been involved with digital photography, film scanning and even monitor calibration. Bit by bit, my scanner, my old monitor calibration device have been rendered junk, impossible to use due to Windows changing its systems every few years.
I understand about “progress” but it ain’t progress when it means enforced redundancy. Old gear should be considered as sacred, and its use protected in new systems. Were that the case, I believe more people would willingly update their systems in order to feel up to speed, as well as just feel good to have the latest toy. If it means you lose vital bits of equipment for no good reason, you will fight the bloody companies until you lose, at which point you can either spend money because you have been forced to, or just say the hell with it, and walk away. So far, restrictions due to compatibility between my old Photoshop version and non-Nikon file types means that if I buy a non-Nikon camera, I won’t be able to access its files unless I spend a lot more just to be able to see the goddam things up on the monitor.
I won’t even attempt to get into the topic of planned camera obsolescence, beyond mentioning that my D700, all the camera I ever needed, is just an ornament now because Nikon pulled the plug on parts. Or so the Spanish importers told me several years ago. Once, you could keep, use and repair film cameras for as long as you desired. The digital world mindset screwed that, all right!