You either get it or you don't with an M. They are stupid expensive and not very flexible. They do odd, strange things, like show banding if teh battery isn'y charged. The screens aren't great. Collectors, obsessives and fetishists run up the prices on used lenses.
However, if an M speaks to you, well, that's it. You're done. I work better with an M than almost any other camera. I think that new users, hearing the hype, after they try, and it connects with them, and IF they can afford it, they will buy it.