I thought that it was the "click" part of the original navigation that really frustrated me, rather than only seeing a little bit at a time. I gave up on the original in a few minutes because my hands/wrists were aching after using a touchpad and then a mouse

I used the zoom versions after the fact primarily so I could swipe to look at the original 1:1 more comfortably, and then only later to follow up on what I thought (correctly) was just a bunch of blank space. Clicking to drag specifically really dampened my enthusiasm for going off in random directions to investigate the whole thing.