that I got during my time on the internet. FM and Dubuis are not marketed exclusively to "watch enthusiasts", they are marketed more as luxury goods. Their marketing strategies are similar to Chanel, Montblanc, or Cartier, and that strategies are usually "frowned upon" on watch forums.
But I think FM wil survive and grow. More so than brands that concentrate only for "watch geeks"
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Disclosure: I like Franck Muller and proudly own 1.