Shadowblade wrote in post #17518916
This is much less of a concern in landscape photography.
A lot of landscape photography is pre-planned - you can spend two weeks just getting to the location, and end up getting there half an hour before the time you want to shoot, or even a few hours early. You have plenty of time to set up. And, if you shoot using technical cameras or MF backs, you need it. Setting up an SLR or mirrorless camera, even with unfamiliar controls, takes much less time.
I'll actually chase clouds and particular weather patterns, so sometimes setup time is actually crazy short with changing light and stuff. But if I didn't and I was fine with whatever was in the sky, I would do it that way. I think the main point that he was making was just being familiar with a system and keeping that other camera for other stuff would mean that it would be second nature when shooting with the landscape camera.
I'm not 100% against new systems myself, I'll switch systems if I really need to, just not ideal during an event for me, but not a big deal for me personally for landscape as you mentioned. That said, I liked the 5D3 and D810 controls a lot more than the A7 series on first and second impression, but haven't spent that much time on the a7 series (customizing buttons and the like).