I no longer mind that people are discovering the light under the Yashica bushel, as I've got just about all the ML lenses I want. My most expensive buy was the 21mm at £175, and I've seen the 24mm go for more than that now, whereas I got mine at less than a third. Some of the zooms are no slouches either, and I was fortunate to get my favourites, the 28-85 and 70-210, for a song.
Obviously I've no right to a say in what people do with theirs, but it would be nice to think they were being used on film rather than adapter-mounted in front of sensors. Most of those who fancy Zeiss glass can generally now get it in their own native mounts.