I, for now, have a Micro Four Thirds camera and I am considering buying one of the Rokinon/Samyang/Bower lenses (these are all branded clones of same lens).
If you go on Amazon, for each lens, you can choose the option of different mounts - Canon, Nikon, Micro Four Thirds, etc. Obviously, I could buy the MFT, but it occurred to me that I have been thinking about getting a Nikon in a bit, so maybe just buying the Nikon mount and using my Nikon-MFT adapter for now would be a better idea - I could use it on both systems.
So obviously I'd get more flexibility, but would there be any downside to this? From what I can see, the lenses themselves are the same, just the mount is changed.
btw price between the 2 mounts is not that big, so I don't care about that. Also price between the different brands sometimes accounts for that, I usually google "samyang rokinon bower chart" and check relative prices, and there hasn't been a big enough variance so far to ever sway me to one mount or other.