There is no option to stack data sources with the new graph type. The stack option only seems to apply within the items of the same data source, but creating graphs this way is not good as the colors are chosen at random and the result is just confusing.
I.e. suppose we need to create a memory graph, adding all items in the same data source (CPU*) creates this totally confusing graph, impossible to discern which is which from the graph:
Adding e..g iowait, system, user, free as different data sources, creates a better graph, but not stacked (does not add to 100):

Am I missing something, or does truly the new graph type do not support stacking sources?
I.e. suppose we need to create a memory graph, adding all items in the same data source (CPU*) creates this totally confusing graph, impossible to discern which is which from the graph:
Adding e..g iowait, system, user, free as different data sources, creates a better graph, but not stacked (does not add to 100):
Am I missing something, or does truly the new graph type do not support stacking sources?