For WPF/Silverlight layout, is it better to use a Grid with lots of rows and columns, or tons of Stackpanels?
I don't think Grid is a better idea.
for example , if you want to insert a row to existing Grid layout document (in the middle)
there exising row is 1,2,3,4 , then the requirement is insert new row between 1 and 2.
then you had to change 2,3,4 to 3,4,5 (find all tag an change....)
think about if one row have 3 - 5 columns... it's a dirty job to reorder all digital.!!!