Well..if you had Huss's M9 m-e ..that was crap right outta the box..and going back and forth to Leica w/o a fix..for months on end..
And then sell for a loss..
Believe it or not, I do have Huss' old M-E, and it is still working as we speak. It has had a sensor replacement (the 2nd one if I am not mistaken), and has been in service since I bought it in early 2014. I am not saying it has been a perfect camera, but it has performed well, even if it does have its quirks.
It's frustrating knowing that sooner or later, that camera will officially become obsolete - meaning, it can no longer take pictures. However, life is short, and if there's anything this epidemic has taught me, it's to live in the moment and make the best of everything. I've made plenty of keeper images on that M-E and that's worth more than the cost. However, I have far less expensive, and older digital cameras that have been more reliable than the Leica, so it doesn't automatically get a 'pass.'
I echo thoughts on the M-240 - it is under appreciated, probably gives you 80% of the performance an M10 does, and has a larger battery for prolonged shooting sessions. I don't think that sensor is going to corrode.
When I was debating a Monochrom camera, I steered away from the M9 variants, even with new sensors, since the price between them and the 240-variants was only a few hundred dollars.
At this rate, my M8 will outlive the M-E, but it has done (and will continue to do) an admirable job. Bad decision from Leica, though - they should have purchased, or acquired enough sensors to service cameras for at least another 5-10 years.