Godfrey
somewhat colored
... I'm very skeptical about "buying in" to a new system from a manufacturer not known for their ability to deliver timely updates or support.
Um, my experience with Leica has been the opposite. They've always been excellent on support and provided sensible updates on a reasonable schedule. For instance, the '65 Summicron-R 50mm f/2 lens I have is a single cam model and cannot drive the open-aperture metering in the Leicaflex SL properly ... it was designed for the original Leicaflex. Leica USA can and will still update the lens. That's not bad for a 50 year old lens!
I'm no optics expert, but would a smaller lens mount interfere with M lenses?
There's an ideal range of lens mount diameter to format size which enables fast lenses to be designed and used with little constraints. Too small a lens mount diameter makes it hard to design a fast lens that doesn't vignette. Too large makes the lenses larger than needed for a format and nets little benefit.
The FourThirds and Micro-FourThirds lens mount was designed to handle up to f/1.4 lenses ideally, with great freedom of optical design and no vignetting. Faster than that and the lens designs become a challenge.
If you look in the throat of the T, the sensor is very undersize for the mount by comparison to any of the other mirrorless cameras. The T mount is larger diameter than the Sony E mount, the next largest, which is just barely large enough to provide a good base for faster lenses on a FF sensor. The body construction is also rugged and stable enough for large lenses. That suggests to me that they are intending a FF sensor for this line at some point in the future.
G