So the default amount is quite small, and amounts to usually 20perc. horizontal stripes if you do 2.5k render, is this not to hog the network ? (I presume what is transfered is .exr?)
I feel like I could lift this is up, and instead compensate the update time, as those stripes aren't much helpful anyway in visual feedback.
Or are there other reasons for the set default ? Can this be set to 'unlimited' (0; so it always sends full image) ? I have almost finished 10Gbe network so I guess that's not issue.