I think there may be a lot of people that do, but there always just chasing the newest and most hyped gear.. when twist sold all his stuff I commented that it would be the case..but was assured it wasn't why...only took him a month.
This is always going to be a leap frog in terms of tech and brands with some people just chancing the hype and pinnacle in minimal performance gains until another brand tops it them its changing time again.Im not really sure whats to gain now, most have great eye af, high iso and fps.
the rumoured specs look good as does the 1dx3 in mirrorless mode. but hate to think what they will be trying to charge. how ever good the rf lenses the size and stupidly high prices puts me off.