https://us.leica-camera.com/Photography/Leica-M/Leica-M10-Monochrom
That's a great camera! They should repack the sensor in L-mount compact body for people interested in that mount, who would not be otherwise interested in investing in M-mount.
The aliasing is bad, where things are sharp.
https://www.dpreview.com/files/p/articles/2062427975/PoP_M10_Mono_L1003430.jpeg
The noise at high ISO is not particularly "great" either:
https://www.dpreview.com/files/p/articles/2062427975/PoP_M10_Mono_L1002638.jpeg
But for 40mp, not that bad either.