Thank you. I am considering the Tamron 70-300mm for landscape. I doubt we will get to puffins, or whales for that matter, otherwise I would bring the 180-600mm But for landscape it feels like overkill.
Well, what if you come onto a great wildlife scene, or want to image that erupting volcano from miles away?
Huge difference between those lens sizes! I can see not bringing the 180-600 unless wildlife is involved.
But here are some examples of what you can do with a long lens (80-400 in these examples) for non-landscape, non-wildlife subjects. Basically, it's either subject isolation, or distant subjects.
From Milan, Italy.

16-35 - I want to see those statues up there.

OOh - a zombie pope

Pope Dumbledore?

Friends learning to paddle in Hawaii.

Raining, and on a motorcycle. Stopped for a moose, pulled out the 80-400 and got a shot as the rain picked up again.