Does attach lens to dslr all the time good for maintain the camera?

Does attach lens to dslr all the time good for maintain the camera? - 1
Added (1). I have nikon d5300 and i only have 18-55mm lens. So i'm considering to attach it to the camera all the time

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Can you use different brand DSLR cameras when filming a movie>?

I am curious on lets say I am making a short film, and I am hiring camera operators 1.) Uses the newest Canon with its lenses 2.) Nikon with Prime lens and 3. A sony, or Black Magic. If you have different brands such as that shooting one scene, and shots so you can cover more angles will that affect the overall quality of the film, when it comes to post Production.

Or does it not matter long as you adjust the settings?

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