It looks great that people are using it for so diversed purposes
I find Agenda great (if not best) for jogging down my research thoughts and plans. Hence, the function of retaining originals is critical. I honestly do not see any reason yet why Agenda is not suitable for “serious things”, except that it has a cute interface if I have to name one.
I guess people need more choices, which is totally reasonable. Personally, I would like to see the original retaining function stays consistent!